SPECIES

Great Blue Heron Ardea herodias

Ross G. Vennesland and Robert W. Butler
Version: 1.0 — Published March 4, 2020
Text last updated April 28, 2011

References

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Literature Cited

American Ornithologists' Union (1983). Check-list of North American Birds. 6th edition. American Ornithologists' Union, Washington, DC, USA.

Andrle, R. F., and J. R. Carroll (1998). The Atlas of Breeding Birds in New York State. Cornell University Press, Ithaca, NY, USA.

Bayer, R. (1984a). Foraging ground displays of Great Blue Herons at Yaquina Estuary, Oregon. Colonial Waterbirds 7:45-54.

Bayer, R. (1984b). Vocalizations of Great Blue Herons at Yaquina Estuary, Oregon. Colonial Waterbirds 7:35-44.

Bayer, R. D. (1978). "Aspects of an Oregon estuarine Great Blue Heron population." In Wading Birds, edited by A. Sprunt IV, J. C. Ogden, and S. Winkler, 213-218. New York: Natl. Audubon Soc. Res. Rep. No. 7.

Bayer, R. D. (1979a). Bald Eagle-Great Blue Heron interactions. Murrelet 60:31-33.

Bayer, R. D. (1980b). Social differences in defecation of Great Blue Herons (Ardea herodias). Auk 97:900-901.

Bayer, R. D. (1981a). Great Blue Herons "mousing" in western Oregon. Murrelet 62:91.

Bayer, R. D. (1981b). Regional variation of Great Blue Heron longevity. Journal of Field Ornithology 52:210-213.

Bayer, R. D. (1982). Great Blue Heron eggshell thickness at Oregon estuaries. Wilson Bulletin 94:198-201.

Bayer, R. D. (1985b). Interactions between Great Blue Herons and gulls. Wilson Bulletin 97:538-541.

Bayer, R. D. (1985c). Shiner perch and Pacific Staghorn sculpins in Yaquina Estaury, Oregon. Northwest Science 59:230-240.

Bayer, R. D. and E. McMahon. (1981). Colony sizes and hatching synchrony of Great Blue Herons in coastal Oregon. Murrelet 62:73-79.

Becker, J. J. (1982). Birds of the Pleistocene American Falls Local Fauna, Idaho. Condor 84:449.

Becker, J. J. (1984). Additions to the late Pleistocene avifauna of Bradenton, Manatee Couty, Florida. Florida Scientists. 47:203.

Becker, J. J. (1985b). A late Pleistocene (Wisconsinan) avifauna from West Palm Beach, Florida. Bulletin of the British Ornithologists' Club 105 (1):37-40.

Becker, J. J. (1986a). An early heron (Aves, Ardeidae, Ardea) from the Middle Miocene of Nebraska. Journal of Paleontology 60 (4):968-970.

Behle, W. H. (1958). The bird life of Great Salt Lake. Salt Lake City: Univ. of Utah Press.

Bellward, G. D., R. J. Nordstrom, P. E. Whitehead, J. E. Elliott, J. E. Bandiera, S. M. Dworschak, T. Chang, S. Forbes, B. Cadario, L. E. Hart and K. M. Chen. (1990). Comparison of polychlorinated dibenzodioxin and dibenzofuran levels with hepatic mixed-function oxidase induction in Great Blue Herons. J. Toxicol. Environ. Health 30:33-52.

Bent, A. C. (1926). Life histories of North American marsh birds. United States National Museum Bulletin 135.

Berger, A. J. (1972). Hawaiian Birdlife. 2nd edition. University Press of Hawaii, Honolulu, HI, USA.

Black, B. B. and M. W. Collopy. (1983). Nocturnal activity of Great Blue Herons in a north Florida saltmarsh. Journal of Field Ornithology 53:403-406.

Blus, L. and C. Henny. (1981). Suspected Great Blue Heron population decline after severe winter in the Columbia Basin. Murrelet 62:16-18.

Blus, L. J., C. J. Henny and T. E. Kaiser. (1980). Pollution ecology of breeding Great Blue Herons in the Columbia Basin, Oregon and Washington. Murrelet 61:63-71.

Brandman, M. (1976). A quantitative analysis of the annual cycle of behavior in the Great Blue Heron (Ardea herodias). Phd Thesis, Univ. Calif., Los Angeles.

Brock, E. M. (1959). Occurrence of the Great Blue Heron in arctic Alaska. Condor 61:59-60.

Brodkorb, P. (1955). The avifauna of the Bone Valley formation. Fla. Geol. Surv. Rep. Investig. 14.

Brodkorb, P. (1963). Catalogue of fossil birds. Part 1 (Archaeopterygiformes through Ardeiformes). Bulletin of the Florida State Museum 7:179–293.

Butler, R. (1991). Habitat selection and time of breeding in the Great Blue Heron (Ardea herodias). Phd Thesis, Univ. of Brit. Col., Vancouver.

Butler, R. W. (1989). "Breeding ecology and population trends of the Great Blue Heron (Ardea herodias fannini) in the Strait of Georgia." In The ecology and status of marine and shoreline birds in the Strait of Georgia, British Columbia., edited by K. Vermeer and R. W. Butler, 112-117. Ottawa: Can. Wildl. Serv. Spec. Publ.

Butler, R. W. (1995). The patient predator: foraging and population ecology of the Great Blue Heron Ardea herodias in British Columbia. Canadian Wildlife Service Occasional Paper 86:1-44.

Butler, R. W. (1997). The Great Blue Heron: a natural history and ecology of a seashore sentinel. Vancouver, B. C.: Univ. Brit. Col. Press.

Butler, R. W., A. M. Breault and T. M. Sullivan. (1990). Measuring animals through a telescope. Journal of Field Ornithology 61:111-114.

Butler, R. W., B. G. Stushnoff, and E. McMackin (1986). The birds of the Creston Valley and southeastern British Columbia. Canadian Wildlife Service Occasional Paper No. 58, Ottawa, ON, Canada.

Byrd, M. A. (1978). Dispersal and movements of six North American Ciconiiforms. In Wading Birds (A. Sprunt IV, J. C. Ogden, and S. Winkler, Editors), National Audubon Society Research Report 7, New York, NY, USA. pp. 161–186.

Campbell, R. W., N. K. Dawe, I. McTaggart-Cowan, J. M. Cooper, G. W. Kaiser, and M. C. E. McNall (1990). The Birds of British Columbia, Volume I. Introduction and Loons through Waterfowl. Royal British Columbia Museum, Victoria, BC, Canada.

Cannings, R. A., R. J. Cannings, and S. G. Cannings (1987). Birds of the Okanagan Valley, British Columbia. Royal British Columbia Museum, Victoria, BC, Canada.

Collazo, J. A. (1979). Breeding biology and food habits of the Great Blue Heron at Heyburn State Park, Benewah County, Idaho. Master's Thesis, Univ. Idaho, Moscow.

Collazo, J. A. (1981). Some aspects of the breeding ecology of the Great Blue Heron at Heyburn State Park. Northwest Science 55:293-297.

Cottrille, W. P. and B. C. Cottrille. (1958). Great Blue Heron: behavior at the nest. Misc. Publ. Mus. Zool., Univ. Mich. 102.

Cramp, S., and K. E. L. Simmons (1977). The Birds of the Western Palearctic. Volume 1. Ostrich to Ducks. Oxford University Press, Oxford, United Kingdom.

Custer, T. W., R. G. Osborn and W. F. Stout. (1980b). Distribution, species abundance and nesting-site use of Atlantic Coast colonies of herons and their allies. Auk 97:591-600.

DesGranges, J. L., P. Laporte and G. Chapdelaine. (1979). First tour of inspection of Quebec heronries, 1977. Ottawa: Can. Wildl. Serv. Progr. Notes No. 93.

Dinsmore, J. J., T. A. Kent, D. Koening, P. C. Petersen, and D. Rossa (1984). Iowa Birds. Iowa State University Press, Ames, IA, USA.

Dolesh, R. J. (1984). Lord of the shallows-the Great Blue Heron. National Geographic Magazine 165:540-554.

Dowd, E. M. and L. D. Flake. (1985a). Arrival and departure patterns of Great Blue Herons at a South Dakota colony. Wilson Bulletin 97:374-378.

Dowd, E. M. and L. D. Flake. (1985b). Foraging habitats and movements of nesting Great Blue Herons in a prairie river ecosystem, South Dakota. Journal of Field Ornithology 56:379-387.

Drapeau, P., R. McNeil and J. Burton. (1984). Influences du derangement humaine et de l'activite du Cormoran a aigretts Phalacrocorax auritus, sur la reproduction du Grant Heron, Ardea herodias, aux iles de la Madeleine. Canadian Field-Naturalist 98:219-222.

Dunn, E. H., D. J. T. Hussell and J. Siderius. (1985). Status of the Great Blue Heron, Ardea herodias, in Ontario. Canadian Field-Naturalist 99:62-70.

Elliott, J. E., R. W. Butler, R. J. Norstrom and P. E. Whitehead. (1988). Levels of polychlorinated dibenzodioxins and polychlorinated dibenzofurans in eggs of Great Blue Herons (Ardea herodias) in British Columbia, 1983-87: possible impacts on reproductive success. Ottawa: Can. Wildl. Serv. Progr. Notes No. 176.

Elliott, J. E., R. W. Butler, R. J. Norstrom and P. E. Whitehead. (1989a). Environmental contaminants and reproductive success of Great Blue Herons Ardea herodias in British Columbia, 1986-87. Environmental Pollution 59:91-114.

Emslie, S. D. (1992). Two new late Blancan avifaunas from Florida and the extinction of wetland birds in the Plio-Pleistocene. In Papers in Avian Paleontology Honoring Pierce Brodkorb (K. E. Campbell, Editor). Science Series No. 36, Natural History Museum of Los Angeles County. pp. 249-269.

Fleming, W. J., B. P. Pullin and D. M. Swineford. (1984a). Population trends and environmental contaminants in herons in the Tennessee valley, 1980-1981. Colonial Waterbirds 7:63-73.

Forbes, L. S. (1982). Prey manipulation in the Great Blue Heron. Murrelet 63:89.

Forbes, L. S. (1987b). Predation on Great Blue Herons: is it important? Colonial Waterbirds 10:120-122.

Forbes, L. S. and E. McMackin. (1984). Extreme aggression in Great Blue Herons. Wilson Bulletin 96:318-319.

Foss, E. (1980). A black bear in a Great Blue Heron colony. Murrelet 61:113.

Georgi, M. R., M. S. Carlisle and L. E. Smiley. (1986). Giardiasis in a Great Blue Heron (Ardea herodias) in New York State: another potential source of waterborne Giardiasis. American Journal of Epidemiology 123:916-917.

Gibbs, J. P. (1991). Spatial relationships between nesting colonies and foraging areas of Great Blue Herons. Auk 108:764-770.

Gibbs, J. P., Woodward, M. L. Hunter and A. E. Huthchinson. (1987b). Determinants of Great Blue Heron colony distribution in coastal Maine. Auk 104:38-47.

Gill, Jr., R. and L. R. Mewaldt. (1979). Dispersal and migratory patterns of San Francisco Bay produced herons, egrets and terns. North American Bird Bander 4:4-13.

Godfrey, W. E. (1986). The Birds of Canada. Revised Edition. National Museums of Canada, Ottawa, ON, Canada.

Godin, J. G. (1977). A Great Blue Heron preying on shiner perch in deep water. Canadian Field-Naturalist 91:88-90.

Graham, K., B. Collier, M. Bradstreet and B. Collins. (1996). Great Blue Heron (Ardea herodias) populations in Ontario: Data from and insights on the use of volunteers. Colonial Waterbirds 19 (1):39-44.

Gray, P., J. W. Grier, G. D. Hamilton and D. P. Edwards. (1980). Great Blue Heron colonies in northwestern Ontario. Canadian Field-Naturalist 94:182-184.

Guthrie, D. A. (1992). "A late Pleistocene avifauna from San Miguel Island, California." In Papers in avian paleontology honoring Pierce Brodkorb., edited by Jr K. E. Campbell, 319-327. Nat. Hist. Mus. Los Angel. Co. Sci. Ser. 36.

Hamblin, N. L. and A. M. Rea. (1985). "Isla Cozumel archaeological avifauna." In, edited by M. Pohl. Cambridge: Peabody Museum of Archaeology and Ethnology, Harvard University.

Hancock, J., and J. Kushlan (1984). The Herons Handbook. Harper and Row Publishers, New York, NY, USA.

Harris, M. P. (1973). The Galápagos avifauna. Condor 75:205-278.

Harrison, C. J. O. (1978). A Field Guide to the Nests, Eggs and Nestlings of North American Birds. Collins, Toronto, ON, Canada.

Hart, L. E., K. M. Cheng, P. E. Whitehead, R. M. Shat, R. J. Lewis, S. R. Ruschkowski, R. W. Blair, D. C. Bennett, S. M. Bandiera, R. J. Norstrom and G. D. Bellward. (1991). Dioxin contamination and growth and development in embryos. J. Toxicol. and Environ. Health 32:331-344.

Heitmeyer, M. E. (1986). Post breeding distribution and habitat use of wading birds in Oklahoma, USA. Colonial Waterbirds 9:163-170.

Henny, C. J. (1972). An analysis of the population dynamics of selected avian species with special reference to changes during the modern pesticide era. Washington, D.C: U.S. Fish Wildl. Serv.

Henny, C. J. and J. E. Kurtz. (1978). Great Blue Herons respond to nesting habitat loss. Wildlife Society Bulletin 6:35-37.

Henny, C. J. and M. R. Bethers. (1971). Population ecology of the Great Blue Heron, with special reference to western Oregon. Canadian Field-Naturalist 85:205-209.

Hjertaas, D. G. (1982). Great Blue Herons and raccoons at Nicolle Flats. Blue Jay 40:36-41.

Hom, C. W. (1983). Foraging ecology of herons in a southern San Francisco Bay salt marsh. Colonial Waterbirds 6:37-44.

Jensen, J. P. (1932). Great Blue Heron fishing in deep water. Auk 47:245-246.

Kahl, M. P. (1971c). Spread-wing postures and their possible functions in the Ciconiidae. Auk 88:715-722.

Kelsall, J. P. and K. Simpson. (1980). A three-year study of the Great Blue Heron in southwestern British Columbia. Proc. Colonial Waterbird Grp. 3:69-74.

Kleen, V. (1987). Illinois heron colony surveys, 1987 report. Illinois Birds and Birding 3:79-82.

Koonz, W. H. (1980). Bald Eagle nest in a Manitoba heronry. Blue Jay 38:47.

Krebs, J. R. (1974). Colonial nesting and social feeding as strategies for exploiting food resources in the Great Blue Heron (Ardea herodias). Behaviour 51:99-131.

Krebs, J. R. and B. Partridge. (1973). Significance of head tilting in the Great Blue Heron. Nature 242:533-535.

Kushlan, J. A. (1976a). Feeding behavior of North American herons. Auk 93 (1):86-94.

Kushlan, J. A. (1978). Feeding ecology of wading birds. In Wading Birds (A. Sprunt IV, J. C. Ogden, and S. Winkler, Editors) National Audubon Society Research Report 7. New York, NY, USA. pp. 249–298.

Kushlan, J. A., G. Morales and P. C. Frohring. (1985). Foraging niche relations of wading birds in tropical wet savannas. Ornithological Monographs 36:663-681.

Kushlan, J. A., M. J. Steinkamp, K. C. Parsons, J. Capp, M. A. Cruz, M. Coulter, I. Davidson, L. Dickson, N. Edelson, R. Elliott, R. M. Erwin, S. Hatch, S. Kress, R. Milko, S. Miller, K. Mills, R. Paul, R. Phillips, J. E. Saliva, W. Sydeman, J. Trapp, J. Wheeler and K. Wohl (2002). Waterbird conservation for the Americas: The North American waterbird conservation plan, version 1. Washington, DC, USA.

Laporte, P. (1982). Organochlorine residues and eggshell measurements of Great Blue Heron eggs from Quebec. Colonial Waterbirds 5:95-103.

Larkins, D. (1989). Heat regulation in the Great-billed Heron Ardea sumatrana. Corella 13:21-23.

Laughlin, S. P., and D. P. Kibbe (1985). The Atlas of Breeding Birds of Vermont. University Press of New England, Hanover, NH, USA.

Lish, J. W. (1983). Comparative eye morphology of ciconiiform birds. Phd Thesis, Univ. Oklahoma, Norman.

Locke, L. N. (1961). Heron and egret losses due to verminous peritonitis. Avian Diseases 5:135-138.

Lopinot, A. C. (1952). Raccoon predation on Great Blue Herons. Auk 68:235.

McAloney, K. (1973). The breeding biology of the Great Blue Heron on Tobacco Island, Nova Scotia. Canadian Field-Naturalist 87:137–140.

Mehner, J. F. (1951). Turkey Vultures attacking Great Blue Heron. Wilson Bulletin 64:242.

Mengel, R. M. (1965). The birds of Kentucky. Ornithological Monographs 3. American Ornithologists' Union, Washington, DC, USA.

Meyerriecks, A. J. (1960a). Comparative breeding behavior of four species of North American herons. Publications of the Nuttall Ornithological Club no. 2. Cambridge, MA, USA.

Milstein, P. Le S., I. Prestt and A. A. Bell. (1970). The breeding cycle of the Grey Heron. Ardea 58:171-257.

Mock, D. W. (1976). Pair formation displays of the Great Blue Heron. Wilson Bulletin 88:185-230.

Mock, D. W. (1978b). Pair-formation displays of the Great Egret. Condor 80:159-172.

Mock, D. W. (1979). Display repertoire shifts and "extramarital" courtship in herons. Behaviour 69:57-71.

Mock, D. W. (1980c). White-dark polymorphism in herons. Paper read at Proc. First Welder Wildl. Found. Symp.

Mock, D. W. (1985). Siblicidal brood reduction: the prey-size hypothesis. American Naturalist 125:327-343.

Mock, D. W. (1987). Siblicide, parent-offspring conflict, and unequal parental investment by egrets and herons. Behavioral Ecology and Sociobiology 20 (4):247-256.

Mock, D. W. and G. A. Parker. (1986). Advantages and disadvantages of egret and heron brood reduction. Evolution 40:459-470.

Mock, D. W., T. C. Lamey and D. B. A. Thompson. (1988). Falsifiability and the information center hypothesis. Ornis Scandinavica 19:231-248.

Montevecchi, W. A. and L. M. Tuck. (1987). Newfoundland birds: exploitation, study, and conservation. Cambridge, MA: Nuttall Ornithol. Club Publ. No. 21.

Moul, I. E. (1990). Environmental contaminants, disturbance and breeding failure at a Great Blue Heron colony on Vancouver Island. Master's Thesis, Univ. Brit. Col., Vancouver.

Norman, D. M., A. M. Breault and I. E. Moul. (1989). Bald Eagle incursions and predation at Great Blue Heron colonies. Colonial Waterbirds 12:143-230.

Oberholser, H. C. (1974). The Bird Life of Texas. University of Texas Press, Austin, TX, USA.

Ogden, J. C. (1978a). "Recent population trends of colonial wading birds on the Atlantic and Gulf coastal plains." In Wading birds, edited by A. Sprunt Iv, J. C. Ogden and S. Winckler, 137-153. New York: Natl. Audubon Soc.

Ohlendorf, H. M., D. M. Swineford and L. N. Locke. (1979b). Organochlorine poisoning of herons. Proc. Colon. Waterbird Group 3:176-185.

Olson, S. L. (1985). The Fossil Record of Birds. In Avian Biology (D. S. Farner, J. R. King, and K. C. Parkes, Editors), Academic Press, New York, NY, USA. pp. 79–238.

Palmer, R. S. (Editor) (1962). Handbook of North American Birds. Volume 1: Loons Through Flamingos. Yale University Press, New Haven, CT, USA.

Parker, J. (1980a). Great Blue Herons (Ardea herodias) in Northwestern Montana: nesting habitat use and the effects of human disturbance. Master's Thesis, Univ. Montana, Missoula.

Parmalee, P. W. (1977). The avifauna from prehistoric Arikara sites in South Dakota. Plains Anthropologist 22 (77):129-222.

Parris, R. W. (1979). Aspects of Great Blue Heron (Ardea herodias) foraging ecology in southwest Lake Erie. Master's Thesis, Ohio State Univ., Columbus.

Peck, G. K., and R. D. James (1983). Breeding Birds of Ontario: Nidiology and Distribution Volume 1: Nonpasserines. Royal Ontario Museum, Toronto, Ontario, Canada.

Peifer, R. W. (1979). Great Blue Herons foraging for small mammals. Wilson Bulletin 91:63-631.

Peters, F. and M. Neukirch. (1986). Transmission of some fish pathogenic viruses by the heron, Ardea cinerea. Journal of Fish Diseases 9:539-544.

Powell, G. V. N. (1983). Food availability and reproduction by Great White Herons Ardea herodias: a food addition study. Colonial Waterbirds 6:139-147.

Powell, G. V. N. and R. D. Bjork. (1989). Relationships between hydrologic conditions and quality and quantity of foraging habitat for Roseate Spoonbills and other wading birds in the C-111 Basin. Homestead, FL: South Florida Res. Center, Everglades Natl. Park, Natl. Park Serv., Annual Rep.

Powell, G. V. N., R. D. Bjork, J. C. Ogden, R. T. Paul, A. H. Powell, and W. B. Robertson Jr. (1989). Population trends in some Florida Bay wading birds. Wilson Bulletin 101:436-457.

Pratt, H. M. (1970). Breeding biology of Great Blue Herons and Common Egrets in central California. Condor 72:407-416.

Pratt, H. M. (1973a). Breeding attempts by juvenile Great Blue Herons. Auk 90:897-899.

Pratt, H. M. (1977). Great Blue Heron interrupts nest-guarding to drink. Condor 79:501-502.

Pratt, H. M. and D. W. Winkler. (1985). Clutch size, timing of laying and reproductive success in a colony of Great Blue Herons and Great Egrets. Auk 102:49-63.

Quinney, T. E. (1982). Growth, diet, and mortality of nestling Great Blue Herons. Wilson Bulletin 94:571-577.

Quinney, T. E. and P. C. Smith. (1979). Reproductive success, growth of nestlings and foraging behaviour of the Great Blue Heron (Ardea herodias herodias L.). Ottawa: Can. Wildl. Serv.

Quinney, T. E. and P. C. Smith. (1980). Comparative foraging behaviour and efficiency of adult and juvenile Great Blue Herons. Canadian Journal of Zoology 58:1168-1173.

Quinney, T. E., B. N. Miller and K. R. S. Quinney. (1981). Gulls robbing prey from Great Blue Herons (Ardea herodias). Canadian Field-Naturalist 95:205-206.

Rickard, W. H. and C. A. Schuler. (1990). Mineral composition of eggshells of wild birds from the Columbia Basin, Washington. Northwestern Naturalist 71:5-8.

Robbins, C. S., D. Bystrack and P. H. Geissler. (1986a). The Breeding Bird Survey: its first fifteen years, 1965-1979. U.S. Fish and Wildl. Serv. resour. publ. 157.

Roberts, T. S. (1955). A Manual for the Identification of the Birds of Minnesota and Neighboring States. University of Minnesota Press, Minneapolis, MN, USA.

Rosenberg, K. V., R. D. Ohmart, W. C. Hunter, and B. W. Anderson (1991). Birds of the Lower Colorado River Valley. University of Arizona Press, Tucson, AZ, USA.

Ryser, R. A., Jr. (1985). Birds of the Great Basin: A Natural History. University of Nevada Press, Reno, NV, USA.

Sandilands, A. P. (1980). Artificial nesting structures for Great Blue Herons. Blue Jay 38:187-188.

Simpson, K. (1984c). Factors affecting reproduction in Great Blue Herons (Ardea herodias). Master's Thesis, Univ. Brit. Col., Vancouver.

Simpson, K., J. N. M. Smith and J. P. Kelsall. (1987). Correlates and consequences of coloniality in Great Blue Herons. Canadian Journal of Zoology 65:572-577.

Spendelow, J. A. and S. R. Patton. (1988). National atlas of coastal waterbird colonies in the contiguous United States: 1976-1982. Washington, D.C: U.S. Fish and Wildl. Serv. Biol. Rep. 88.

Sutton, G. M. (1967). Oklahoma Birds, their Ecology and Distribution with Comments on the Avifauna of the Southern Great Plains. University of Oklahoma Press, Norman, OK, USA.

Taverner, P. A. (1926). Birds of western Canada. Ottawa: Canada Dept. Mines, Victoria Mem. Mus. Bull. 41.

Thompson, D. H. (1978c). Feeding areas of Great Blue Herons and Great Egrets nesting within the floodplain of the upper Mississippi River. Proc. Colonial Waterbirds Group. 2:202-213.

Verbeek, N. A. M. and R. W. Butler. (1989). "Feeding ecology of shoreline birds in the Strait of Georgia." In The ecology and status of marine and shoreline birds in the Strait of Georgia, British Columbia., edited by K. Vermeer and R. W. Butler, 74-81. Ottawa: Can. Wildl. Serv. Spec. Publ.

Vermeer, K. (1969d). Great Blue Heron colonies in Alberta. Canadian Field-Naturalist 83:237-242.

Vermeer, K. (1973c). Great Blue Heron and Double-crested Cormorant colonies in the Prairie Provinces. Canadian Field-Naturalist 87:427-432.

Vermeer, K. and G. Anweiler. (1970). Great Blue Heron colonies in Saskatchewan in 1970. Blue Jay 28:158-161.

Vermeer, K. and R. W. Risebrough. (1972). Additional information on egg shell thickness in relation to DDE concentrations in Great Blue Heron eggs. Canadian Field-Naturalist 86:384-385.

Vos, D. K., D. A. Ryder and W. D. Graul. (1985). Response of breeding Great Blue Herons to human disturbances in northcentral Colorado. Colonial Waterbirds 8:13-22.

Werschkul, D. F., E. McMahon and M. Leitschuh. (1977). Observations on the reproductive ecology of the Great Blue Heron in western Oregon. Murrelet 58:7-12.

Willard, D. E. (1977). The feeding ecology and behavior of five species of herons in southeastern New Jersey. Condor 79:462-470.

Williamson, F. S. L., L. J. Peyton and M. E. Islieb. (1965). New distributional and overwintering records of birds from south-central Alaska. Condor 67:73-80.

Wolf, B. O. and S. L. Jones. (1989). Great Blue Heron deaths caused by predation on Pacific lamprey. Condor 91:482-484.

Additional References

Adams, C. J., S. H. Feldman and J. M. Sleeman. (2005). Phylogenetic analysis of avian poxviruses among free-ranging birds of Virginia. Avian Diseases 49 (4):601-605.

Ajemian, M.J., Dolan, D., Graham, W.M. and Powers, S.P. (2011). First evidence of elasmobranch predation by a waterbird: stingray attack and consumption by the Great Blue Heron (Ardea herodias). Waterbirds. 34(1): 117-120.

Allen, G.T. and Ramirez, P. (1990). A review of bird deaths on barbed-wire fences. Wilson Bull.. 102(3): 553–558.http://sora.unm.edu/sites/default/files/journals/wilson/v102n03/p0553-p0558.pdf

Allen, R.P. (1962). Birds of the Caribbean. Thames and Hudson, London.

Alström, P., and P. Colston. (1991). A Field Guide to the Rare Birds of Britain and Europe. Harper Collins, London, United Kingdom.

Anderson, D. W., and J. J. Hickey (1972). Eggshell changes in certain North American birds. In Proceedings of the XVth International Ornitholological Congress (K. H. Voous, Editor). E. J. Brill, Leiden, Netherlands. pp. 514–540.

Anderson, J. M. (1978a). "Protection and management of wading birds." In Wading birds, edited by A. Sprunt Iv, J. C. Ogden and S. Winckler, 99-103. New York: Natl. Audubon Soc.

Austin, H. M. (1996a). Observations on daylight feeding perodicities of wading birds (Ardeidae) in Sarah's Creek, York River, Virginia. Journal of the Elisha Mitchell Scientific Society 111:137-145.

Bacon, B. and Gower, C. (1996). Turtle-Flambeau Flowage wildlife surveys 198662–199662 and 1995. Passenger Pigeon. 58(1): 23–34.

Badzinski, S.S., Cannings, R.J., Smith, T. and Komaromi, J. (2005). British Columbia Coastal Waterbird Survey: An Evaluation of Survey Power and Species Trends after Five Years of Monitoring. Report for British Columbia Ministry of Water, Land, and Air Protection & Environment Canada / Canadian Wildlife Service.

Baker, K. (1993). Identification guide to European non-passerines, BTO Guide 24. British Trust for Ornithology, Thetford, United Kingdom.

Baker, S. D. and M. S. Sepulveda. (2009). An evaluation of the effects of persistent environmental contaminants on the reproductive success of Great Blue Herons (Ardea herodias) in Indiana. Ecotoxicology 18 (3):271-280.

Bancroft, G. T. (1989). Status and conservation of wading birds in the everglades. American Birds 43 (5):1258-1265.

Bancroft, G. T., D. E. Gawlik and K. Rutchey. (2002). Distribution of wading birds relative to vegetation and water depths in the northern Everglades of Florida, USA. Waterbirds 25 (3):265-277.

Bayer, R. D. (1981c). Weights of Great Blue Herons at the Yaquina estuary, Oregon. Murrelet 62:18-19.

Bayer, R. D. (1985a). Bill length of herons and egrets as an estimator of prey size. Colonial Waterbirds 8:104-109.

Beckmann, C., Biro, P.A. and Post, J.R. (2006). Asymmetric impact of piscivorous birds on size-structured fish populations. Canadian Journal of Zoology. 84: 1584–1593.

Bennett, D. C., P. E. Whitehead and L. E. Hart. (1995). Growth and energy requirements of hand-reared Great Blue Heron (Ardea herodias) chicks. Auk 112 (1):201-209.

Bennett, D.C., Whitehead, P.E. and Hart, L.E. (1995). Growth and energy requirements of hand-reared Great Blue Heron (Ardea herodias) chicks. Auk. 112(1): 201-209.

Bent, A. C. (1926). Life Histories of North American Marsh Birds. U.S. National Museum Bulletin 135. Smithsonian Institution, Washington, DC, USA.

Beyer, W. N., M. G. Spalding and D. Morrison. (1997). Mercury concentrations in feathers of wading birds from Florida. Ambio 26 (2):97-100.

Birds, American. (1991a). 90th Christmas Bird Count. American Birds 44:547-1042.

Bjorklund, R. G. (1975). On the death of a midwestern heronry. Wilson Bulletin 87 (2):284-287.

Bjorklund, R. G. and D. J. Holm. (1997). Impact of flooding on Illinois River wading bird colonies. Transactions of the Illinois State Academy of Science 90 (3-4):123-133.

Blake, E.R. (1977). Manual of Neotropical Birds. Vol. 1. Spheniscidae (Penguins) to Laridae (Gulls and Allies). The University of Chicago Press, Chicago & London.

Bock, W. J. (1956). A generic review of the family Ardeidae (Aves). American Museum Novitates 1779:1–49.

Bostwick, K. S., and M. J. Brady (2002). Phylogenetic analysis of wing feather taxis in birds: Macroevolutionary patterns of genetic drift? Auk 119:943–954.

Bowman, I. and J. Siderius. (1984). Management guidelines for the protection of heronries in Ontario. Nongame Prog., Wildl. Br., Ontario Min. of Nat. Res.

Brand, L.A., Stromberg, J.C. and Noon, B.R. (2010). Avian density and nest survival on the San Pedro River: importance of vegetation type and hydrologic regime. Journal of Wildlife Management. 74(4): 739–754.https://doi.org/10.2193/2008-217

Brandman, M. (1976). A Quantitative Analysis of the Annual Cycle of Behavior in the Great Blue Heron. PhD thesis, UCLA, Los Angeles.

Brazil, M. (2009). Field Guide to the Birds of East Asia: Eastern China, Taiwan, Korea, Japan and Eastern Russia. Christopher Helm, London.

Brazil, M. (2009). Field Guide to the Birds of East Asia: Eastern China, Taiwan, Korea, Japan and Eastern Russia. Christopher Helm, London.

Bryant, J. (1997). Population trends of American vagrants. Birding World. 10(9): 340–349.

Buden, D.W. (1992). The birds of Long Island, Bahamas. Wilson Bull.. 104(2): 220–243.http://sora.unm.edu/sites/default/files/journals/wilson/v104n02/p0220-p0243.pdf

Buden, D.W. (1992). The birds of the Exumas, Bahamas Islands. Wilson Bulletin 104(4):674–698.

Buden, D.W. and Sprunt, A. (1993). Additional observations on the birds of the Exumas, Bahama Islands. Wilson Bulletin 105(3):514–518.http://sora.unm.edu/sites/default/files/journals/wilson/v105n03/p0514-p0518.pdf

Bull, J. (1964). Birds of the New York area. New York: Harper and Row.

Burkholder, G. and D. G. Smith. (1991). Nest trees and productivity of Great Blue Herons (Ardea herodias) at Knox Lake, north-central Ohio. Colonial Waterbirds 14 (1):61-62.

Burkholder, G. and Smith, D. (1991). Nest Trees and Productivity of Great Blue Herons (Ardea herodias) at Knox Lake, noth-central Ohio. Colonial Waterbirds. 14(1): 61-62.

Butler, R. W. (1992b). A review of the biology and conservation of the Great Blue Heron (Ardea herodias) in British Columbia. Delta, B.C: Can. Wildl. Serv. Tech. Rep. No. 154.

Butler, R. W. and R. G. Vennesland. (2000). Integrating climate change and predation risk with wading bird conservation research in North America. Waterbirds 23 (3):535-540.

Butler, R. W., P. E. Whitehead, A. M. Breault and I. E. Moul. (1995). Colony effects on fledging success of Great Blue Herons (Ardea herodias) in British Columbia. Colonial Waterbirds 18 (2):159-165.

Butler, R.W. (1993). Time of breeding in relation to food availability of female Great Blue Herons (Ardea herodias). Auk. 110(4): 693-701.

Butler, R.W., Morrison, R.I.G., Delgado, F.S., Ross, R.K. and Smith, G.E.J. (1997). Habitat associations of coastal birds in Panama. Colonial Waterbirds. 20(3): 518–524.

Butler, R.W., Whitehead, P.E., Breault, A.M. and Moul, I.E. (1995). Colony effects on fledging success of Great Blue Herons (Ardea herodias) in British Columbia. Colonial Waterbirds. 18(2) :159-165.

Byrd, M.A. (1978). Dispersal and movements of six North American Ciconiiforms. Pp. 161–185 in: Sprunt et al. (1978).

Carlson, B. A. and E. B. McLean. (1996). Buffer zones and disturbance types as predictors of fledging success in Great Blue Herons, Ardea herodias. Colonial Waterbirds 19 (1):124-127.

Carlson, B.A. and McLean, E.B. (1996). Buffer zones and disturbance types as predictors of fledging success in Great Blue Herons, Ardea herodias. Colonial Waterbirds. 19(1): 124-127.

Carmona, R. and Danemann, G.D. (1994). Nesting waterbirds of Santa Maria Bay, Sinaloa, Mexico, April 1988. Western Birds. 25(3): 158–162.

Carmona, R., J. Guzmán, S. Ramírez, and G. Fernández (1994). Breeding waterbirds of La Paz Bay, Baja California Sur, Mexico. Western Birds 25:151–157.

Carmona, R., Ramírez, S., Zárate, B. and Becerril, F. (1996). Some nesting waterbirds from southern San Jose Island and adjacent islands, Gulf of California, Mexico. Western Birds. 27(2): 81-85.

Carney, K. M. and W. J. Sydeman. (1999). A review of human disturbance effects on nesting colonial waterbirds. Waterbirds 22 (1):68-79.

Champoux, L., J. Rodrigue, S. Trudeau, M. H. Boily, P. A. Spear and A. Hontela. (2006b). Contamination and biomarkers in the Great Blue Heron, an indicator of the state of the St. Lawrence River. Ecotoxicology 15 (1):83-96.

Chang, Q., B.-W. Zhang, H. Jin, L.-F. Zhu, and K.-Y. Zhou (2003). Phylogenetic relationships among 13 species of herons inferred from mitochondrial 12S rRNA gene sequences. Acta Zoologica Sinica 49:205–210.

Chapman, F. M. (1901a). A new race of the Great Blue Heron with remarks on the status and range of Ardea wardi. Bulletin of the American Museum of Natural History 14:87-90.

Chavez-Ramirez, F. and Slack, R.D. (1995). Differential use of coastal marsh habitats by nonbreeding wading birds. Colonial Waterbirds. 18(2): 166–171.

Clarke, T. (1999). The Great Blue Heron on Tenerife. Birding World. 12(4): 158-161.

Clarke, T. (2006). Birds of the Atlantic Islands. Christopher Helm, London.

Clarke, T. (2006). Birds of the Atlantic Islands. Christopher Helm, London.

Connolly, L.M. and Colwell, M.A. (2005). Comparative use of longline oysterbeds and adjacent tidal flats by waterbirds. Bird Conservation International. 15(3): 237–255.

COSEWIC. (2008). COSEWIC asessment and update status reoprt on the Great Blue Heron fannini subspecies Ardea herodias fannini in Canada. 39.

Cottrille, W.P. and Cottrille, B.D. (1958). Great Blue Heron: Behavior at the Nest. Miscellaneous Publications Museum of Zoology, University of Michigan 102.

Crozier, G. E. and D. E. Gawlik. (2002). Avian response to nutrient enrichment in an oligotrophic wetland, the Florida Everglades. Condor 104 (3):631-642.

Crozier, G. E. and D. E. Gawlik. (2003b). Wading bird nesting effort as an index to wetland ecosystem integrity. Waterbirds 26 (3):303-324.

Curry-Lindahl, K. (1971). Systemic relationships in herons (Ardeidae), based on comparative studies of behaviour and ecology: A preliminary account. Ostrich 9 (Supp.):53-70.

Custer, C. M. and J. Galli. (2002). Feeding habitat selection by Great Blue Herons and Great Egrets nesting in east central Minnesota. Waterbirds 25 (1):115-124.

Custer, C. M., S. A. Suarez and D. A. Olsen. (2004). Feeding habitat characteristics of the Great Blue Heron and Great Egret nesting along the Upper Mississippi River, 1995-1998. Waterbirds 27 (4):454-468.

Custer, T. W., R. K. Hines and C. M. Custer. (1996b). Nest initiation and clutch size of Great Blue Herons on the Mississippi River in relation to the 1993 flood. Condor 98 (2):181-188.

Custer, T.W., Hines, R.K. and Custer, C.M. (1996). Nest initiation and clutch size of Great Blue Herons on the Mississippi River in relation to the 1993 flood. Condor. 98(1): 181-188.

Custer, T.W., Osborn, R.G. and Stout, W.F. (1980). Distribution, species abundance, and nesting-site use of Atlantic Coast colonies of herons and their allies. Auk. 97(3): 591–600.

Danemann, G.D. and Guzman Poo, J.R. (1992). Notes on the birds of San Ignacio Lagoon, Baja California Sur, Mexico. Western Birds. 23(1): 11–19.

David, P. G. (1994). Wading bird nesting at Lake Okeechobee, Florida: An historic perspective. Colonial Waterbirds 17:69–77.

David, P.G. (1994). Wading bird nesting at Lake Okeechobee, Florida: an historic perspective. Colonial Waterbirds. 17(1): 69–77.

David, P.G. (1994). Wading bird use of Lake Okeechobee relative to fluctuating water levels. Wilson Bull.. 106(4): 719–732.

Davis, W. E., Jr. (2001c). "Practice" foraging by a sub-adult Great Blue Heron. Florida Field Naturalist 29 (3):88-89.

de Juana, E. and el Comité de Rarezas de la Sociedad Española de Ornitología (2001). Observaciones de aves raras en España, año 1999. Ardeola. 48(1): 117–136.

Delany, S. and D. Scott. (2002). Waterbird population estimates: third edition. Wetlands International Global Series 12:222.

DesGranges, J. L. (1979). Adaptive value of social behavior in the Great Blue Heron. Proc. Colonial Waterbirds Group 2:192-201.

DesGranges, J. L. (1996a). "Great Blue Heron." In The Breeding Birds of Quebec: atlas of the breeding birds of southern Quebec., edited by J. Gauthier and Y. Aubry, 242-245. Montreal: Province of Quebec society for the Protection of Birds, CWS, Environment Canada.

Dickerman, R. W. (1992). Northeastern records of Ardea herodias wardi from the southeastern United States. Kingbird 42 (1):10-13.

Dickerman, R. W. (2004a). A review of the North American subspecies of the Great Blue Heron (Ardea herodias). Proceedings of the Biological Society of Washington 117 (3):242-250.

Dickerman, R. W. (2004b). Characteristics and distribution of Ardea herodias fannini with comments on the effect of washing on the holotype. Northwestern Naturalist 85 (3):130-133.

Dickerman, R. W. (2007). Birds of the southern Pacific lowlands of Guatemala with a review of Icterus gularis. Special Publication the Museum of Southwestern Biology 7:1-46.

Dickerman, R.W. (2004). A review of the North American subspecies of the Great Blue Heron (Ardea herodias). Proc. Biol. Soc. Washington 117(3): 242–250.

Dove, C.J., Snow, R.W., Rochford, M.R. and Mazzotti, F.J. (2011). Birds consumed by the invasive Burmese python (Python molurus bivittatus) in Everglades National Park, Florida, USA. Wilson J. Orn.. 123(1): 126–131.

Drees, B. M. (1994). Red imported fire ant predation on nestlings of colonial waterbirds. Southwestern Entomologist 19 (4):355-359.

Eissinger, A. (2007). Great Blue Herons in Puget Sound. Seattle, Washington: Published by Seattle District, U.S. Corps of Engineers.

Elliott, J. E. and M. L. Harris. (2001). An ecotoxicological assessment of chlorinated hydrocarbon effects on Bald Eagle populations. Reviews in Toxicology (Amsterdam) 4 (1-2):1-60.

Elliott, J. E., L. K. Wilson and B. Wakeford. (2005). Polyhrominated diphenyl ether trends in eggs of marine and freshwater birds from British Columbia, Canada, 1979-2002. Environmental Science & Technology 39 (15):5584-5591.

Elliott, J. E., M. L. Harris, L. K. Wilson, P. E. Whitehead and R. J. Norstrom. (2001a). Monitoring temporal and spatial trends in polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) in eggs of Great Blue Heron (Ardea herodias) on the coast of British Columbia, Canada, 1983-1998. Ambio 30 (7):416-428.

English, S. M. (1978). "Distribution and ecology of Great Blue Heron colonies on the Willamette River, Oregon." In Wading Birds, edited by A. Sprunt Iv, J. C. Ogden and S. Winkler, 235-244. National Audubon Society.

Erwin, R. M. (1989b). Responses to human intruders by birds nesting in colonies: experimental results and management guidelines. Colonial Waterbirds 12 (1):104-108.

Erwin, R.M., Hatfield, J.S. and Wilmers, T.J. (1995). The value and vulnerability of small estuarine islands for conserving metapopulations of breeding waterbirds. Biological Conservation. 71: 187-191.

Esler, D. (1992). Habitat use by piscivorous birds on a power plant cooling reservoir. J. Field Orn.. 63(3): 241–249.

Evans, P.G.H. (1990). Birds of the Eastern Caribbean. Macmillan Education Ltd, London & Basingstoke.

Ewins, P.J., Miller, M.J.R., Barker, M.E. and Postupalsky, S. (1994). Birds breeding in or beneath Osprey nests in the Great Lakes basin. Wilson Bull.. 106(4): 743–749.

Faber, R. A. (1972). Organochlorine and mercury in Common Egrets and Great Blue Herons. Environmental Pollution 3:111-122.

Federation of Alberta Naturalists (2007). Atlas of Breeding Birds of Alberta: A Second Look. Federation of Alberta Naturalists, Edmonton, AB, Canada.

Fisher, A. (2007). The Great Blue Heron on the Isles of Scilly – a new British bird. Birding World. 20(12): 497-502.

Fisher, E.A. (2010). Great Blue Heron on Scilly: new to Britain. British Birds. 103(4): 206-212.

Fjeldså, J. and Krabbe, N. (1990). Birds of the High Andes. A Manual to the Birds of the Temperate Zone of the Andes and Patagonia, South America. Zoological Museum, University of Copenhagen & Apollo Books, Copenhagen & Svendborg.

Fleury, B. E., and T. W. Sherry (1995). Long-term population trends of colonial wading birds in the southern United States: The impact of crayfish aquaculture on Louisiana populations. Auk 112:613–632.

Forbes, L. S. (1987a). Feeding behavior of Great Blue Herons at Creston, British Columbia. Canadian Journal of Zoology 65 (12):3062-3067.

Forbes, L. S., K. Simpson, J. P. Kelsall and D. R. Flook. (1985a). Great Blue Heron colonies in British Columbia. Delta: Canadian Wildlife Service.

Forbes, L. S., K. Simpson, J. P. Kelsall and D. R. Flook. (1985b). Reproductive success of Great Blue Herons in British Columbia. Canadian Journal of Zoology 63:1110-1113.

Forbes, L.S. (1987). Feeding behaviour of Great Blue Herons at Creston, British Columbia. Canadian Journal of Zoology. 65: 3062-3067.

Forbes, L.S., Simpson, K., Kelsall, J.P. and Flook, D.R. (1985). Reproductive success of Great Blue Herons in British Columbia. Canadian Journal of Zoology. 63: 1110-1113.

Found, C., Webb, S.M. and Boyce, M.S. (2008). Selection of lake habitats by waterbirds in the boreal transition zone of northeastern Alberta. Canadian Journal of Zoology. 86: 277–285.https://doi.org/10.1139/Z07-137

Frederick, P.C. and McGehee, S.M. (1994). Wading bird use of wastewater treatment wetlands in central Florida, USA. Colonial Waterbirds. 17(1): 50–59.

Frederick, P.C., Towles, T., Sawicki, R.J. and Bancroft, G.T. (1996). Comparison of aerial and ground techniques for discovery and census of wading bird (Ciconiiformes) nesting colonies. Condor. 98(4): 837–841.

Frohring, P. C., D. P. Voorhees and J. A. Kushlan. (1988). History of wading bird populations in the Florida Everglades: a lesson in the use of historical information. Colonial Waterbirds 11 (2):328-335.

Gantlett, S. (1998). Identification of Great Blue Heron and Grey Heron. Birding World. 11(1): 12–20.

Garrido, O. H. and A. Kirkconnell. (2000). Field guide to the birds of Cuba. Ithaca, NY: Comstock/Cornell U. Press.

Gawlik, D. E. (2002). The effects of prey availability on the numerical response of wading birds. Ecological Monographs 72 (3):329-346.

Gebauer, M. B. and I. E. Moul. (2001). Status of the Great Blue Heron in British Columbia. Victoria: Brisih Columbia Ministry of the Environment, Lands and Parks.

George, C. J. and A. Moore. (1990). Overwintering of the Great Blue Heron at Collins Lake, Schenectady Co, New York. Kingbird 40:75-82.

Gerrard, J.M., Gerrard, P.N., Dzus, E.H., Bortolotti, G.R. and Scragg, E. (2006). Population changes in water-associated birds at Besnard Lake, SK, 1976-276765. Blue Jay. 64(3): 149–154.

Gibbs, J. P. and L. K. Kinkel. (1997). Determinants of the size and location of Great Blue Heron colonies. Colonial Waterbirds 20 (1):1-7.

Gibbs, J.P. and Kinkel, L.P. (1997). Determinants of the size and location of Great Blue Heron colonies. Colonial Waterbirds. 20(1): 1-7.

Graham, K., Collier, B., Bradstreet, M. and Collins, B. (1996). Great Blue Heron (Ardea herodias) populations in Ontario: data from and insights on the use of volunteers. Colonial Waterbirds. 19(1): 39-44.

Green, M. C. and P. L. Leberg. (2006). Sociality among foraging Ardeidae: Does plumage coloration influence nearest-neighbor spacing? American Midland Naturalist 156 (2):344-352.

Gutsell, R. (1995). Age-related foraging behaviour and habitat use in Great Blue Herons. M.S. thesis, Simon Fraser University, B.C.

Hancock, J., and H. Elliot (1978). The Herons of the World. Harper and Row, New York, NY, USA.

Hanson, L. and A. R. Smith. (2000). Great Blue Heron colonies in Saskatchewan in 1999, a preliminary inventory. Blue Jay 58 (2):81-85.

Harris, M. L., J. E. Elliott, R. W. Butler and L. K. Wilson. (2003a). Reproductive success and chlorinated hydrocarbon contamination of resident Great Blue Herons (Ardea herodias) from coastal British Columbia, Canada, 1977 to 2000. Environmental Pollution 121 (2):207-227.

Harris, R. J., F. S. Tseng, M. A. Pokras, B. A. Suedmeyer, J. S. H. Bogart, R. L. Prescott, and S. H. Newman (2006). Beached bird surveys in Massachusetts: The Seabird Ecological Assessment Network (SEANET). Marine Ornithology 34(2): 115–122.http://www.marineornithology.org/PDF/34_2/34_2_115-122.pdf

Heitmeyer, M.E. (1986). Postbreeding distribution and habitat use of wading birds in Oklahoma, USA. Colonial Waterbirds. 9(2): 163–170.

Henny, C.J. and Bethers, M.R. (1971). Population ecology of the Great Blue Heron with special reference to western Oregon. Canadian Field-Naturalist. 85: 205-209.

Hilty, S. L. (2003) Birds of Venezuela. Princeton University Press, Princeton, New Jersey.

Hilty, S. L., and W. L. Brown (1986) A guide to the birds of Colombia. Princeton University Press, Princeton, New Jersey.

Hilty, S.L. and Brown, W.L. (1986). A Guide to the Birds of Colombia. Princeton University Press, Princeton, New Jersey.

Hoffman, R. D. (1978). "The diets of herons and egrets in southwestern Lake Erie." In Wading birds., edited by A. Sprunt Iv, J. C. Ogden and S. Winckler, 365-369. New York: Res. rep. no. 7. National Audubon Soc.

Holt, E. (1928). The Status of the Great White Heron (Ardea occidentalis Audubon) and Würdemann's Heron (Ardea würdemannii Baird). Scientific Publications of the Cleveland Museum of Natural History 1(1). Cleveland, Ohio.

Holt, E. G. (1925). Type locality of Ardea herodias wardi Ridgway: A correction. Auk 42:266-267.

Holt, E. G. (1928). The status of the Great White Heron (Ardea occidentalis auduboni) and Wurdemann's Heron (Ardea wurdemannii). Sci. Pub. Cleveland Mus. 1:1-35.

Hom, C.W. (1983). Foraging ecology of herons in a southern San Francisco Bay salt marsh. Colonial Waterbirds. 6(1): 37–44.

Howell, S. N. G. (2010). Peterson Reference Guide to Molt in North American Birds. Houghton Mifflin Harcourt Company, Boston, MA, USA.

Howell, S. N. G., and S. Webb (1995). A Guide to the Birds of Mexico and Northern Central America. Oxford University Press, New York, NY, USA.

Howell, S. N. G., C. Corben, P. Pyle, and D. I. Rogers (2003). The first basic problem: A review of molt and plumage homologies. Condor 105: 635–653.

Howell, S. N. G., C. Corben, P. Pyle, and D. I. Rogers (2004). The first basic problem revisited: Reply to commentaries on Howell et al. (2003). Condor 106: 206–210.

Humphrey, P. S., and K. C. Parkes (1959). An approach to the study of molts and plumages. Auk 76: 1–31.

Ikuta, L.A. and Blumstein, D.T. (2003). Do fences protect birds from human disturbance? Biological Conservation. 112: 447–452.

Jenni, D.A. (1969). Diving times of the Least Grebe and Masked Duck. Auk. 86: 355-356.

Jiménez, A., García-Lau, I., González, A., Mugica, L. and Acosta, M. (2014). Valores de masa corporal de 183 especies de aves cubanas. Rev. Cubana Cienc. Biol.. 3(1): 22–42.

Johnson, W. P., P. R. Garrettson and F. C. Rohwer. (1996a). Confirmation of kleptoparasitism by American White Pelicans on Great Blue Herons. Colonial Waterbirds 19 (2):262-263.

Jones, I. M. (2010b). Associative nesting behaviour between Pacific Great Blue Herons and ?Bald Eagles in the Pacific northwest: testing the predator protection hypothesis. M.S. thesis, Simon Fraser University, B.C.

Karwowski, K., Gates, J.E. and Harper, L.H. (1995). Common Terns nesting on navigational aids and natural islands in the St. Lawrence River, New York. Wilson Bull.. 107(3): 423-436.

Kelly, J. F., D. E. Gawlik and D. K. Kieckbusch. (2003). An updated account of wading bird foraging behavior. Wilson Bulletin 115 (1):105-107.

Kelly, J. P., D. Stralberg, K. Etienne and M. McCaustland. (2008). Landscape influence on the quality of heron and egret colony sites. Wetlands 28 (2):257-275.

Kelly, J. P., H. M. Pratt and P. L. Greene. (1993). The distribution, reproductive success and habitat characteristics of heron and egret breeding colonies in the San Francisco Bay area. Colonial Waterbirds 16:18-27.

Kelly, J. P., K. Etienne, C. Strong, M. McCaustland and M. L. Parkes. (2007). Status, trends, and implications for the conservation of heron and egret nesting colonies in the San Francisco Bay area. Waterbirds 30 (4):455-478.

Kelly, J.F., Gawlik, D.E. and Kieckbusch, D.K. (2003). An updated account of wading bird foraging behavior. Wilson Bull.. 115(1): 105–107.

Kelly, J.P., Pratt, H.M. and Greene, P.L. (1993). The distribution, reproductive success, and habitat characteristics of heron and egret breeding colonies in the San Francisco Bay area. Colonial Waterbirds. 16(1): 18–27.

Kenyon, J. K., B. D. Smith and R. W. Butler. (2007). Can redistribution of breeding colonies on a landscape mitigate changing predation danger? Journal of Avian Biology 38 (5):541-551.

Kenyon, J.K., Smith, B.D. and Butler, R.W. (2007). Can redistribution of breeding colonies on a landscape mitigate changing predation danger? Journal of Avian Biology. 38(5): 541-551.

Kirwan, G.M., Brinkhuizen, D., Calderón, D., Davis, B., Minns, J. and Roesler, I. (2014). Neotropical Notebook. Neotropical Birding 15:46–62.

Knight, E. C. (2010a). Population trends and habitat availability of nesting Pacific Great Blue Herons (Ardea herodias fannini) in southcoastal British Columbia. B.S. thesis, University of Victoria, B.C.

Knutson, M.G. and Klaas, E.E. (1997). Declines in abundance and species richness of birds following a major flood on the upper Mississippi River. Auk. 114(3): 367-380.

Koonz, W. H. and P. W. Rakowski. (1985). Status of colonial waterbirds nesting in southern Manitoba. Canadian Field-Naturalist 99 (1):19-29.

Krebs, J.R. (1974). Colonial nesting and social feeding as strategies for exploiting food resources in the Great Blue Heron (Ardea herodias). Behaviour 51: 99-134.

Kubisz, M. A. (1989b). Unusual feeding behavior of the Great Blue Heron. Ontario Birds 7 (3):111-112.

Kushlan, J. A. (1979c). Effects of helicopter censuses on wading bird colonies. Journal of Wildlife Management 43 (3):756-760.

Kushlan, J. A., and J. A. Hancock (2005). The Herons. Oxford University Press, New York, NY, USA.

Kushlan, J.A. and Hancock, J.A. (2005). The Herons. Oxford University Press, Oxford.

Latta, S., C. Rimmer, A. Keith, J. Wiley, H. Raffaele, K. McFarland and E. Fernandez. (2006). Birds of the Dominican Republic and Haiti. Princeton: Princeton University Press.

Leberg, P.L., Green, M.C., Adams, B.A., Purcell, K.M. and Luent, M.C. (2007). Response of waterbird colonies in southern Louisiana to recent drought and hurricanes. Animal Conservation. 10: 502–508.

Leonard, W. (1985). Inverntory of Great Blue Heron Nest Colonies in Southern and Western Puget Sound. Olympia, Washington, U.S.A.: Washington Department of Wildlife.

Lethaby, N. and Mclaren, I.A. (2002). The identification of Gray Heron. Birding. 34(1): 25–33.

Loegering, J. P. and R. G. Anthony. (1999). Distribution, abundance, and habitat association of riparian-obligate and -associated birds in the Oregon Coast Range. Northwest Science 73 (3):168-185.

Lopez-Ornat, A. and Ramo, C. (1992). Colonial waterbird populations in the Sian Ka’an Biosphere Reserve (Quintana Roo, Mexico). Wilson Bull.. 104(3): 501–515.

Madenjian, C.P. and Gabrey, S.W. (1995). Waterbird predation on fish in western Lake Erie: a bioenergetics model application. Condor. 97(1): 141–153.

Malosh, G. (2004). Great Blue Heron x Great Egret in Washington County. Pennsylvania Birds 18 (2):72-73.

Mark, D. M. (1976). An inventory of Great Blue Heron Ardea herodias nesting colonies in British Colulmbia. Northwest Science 50 (1):32-41.

Markham, B. J. and S. H. Brechtel. (1978). Status and management of three colonial waterbird species in Alberta. Proceedings of the Conference of the Colonial Waterbird Group 1978:55-64.

Mayr, E. (1956b). Is the Great White Heron a good species. Auk 73 (1):71-77.

Mayr, E., and L. L. Short (1970). Species Taxa of North American Birds: A Contribution to Comparative Systematics. Publications of the Nuttall Ornithological Club 9, Cambridge, MA, USA.

McClung, R.M. (1969). Lost Wild America. The Story of our Extinct and Vanishing Wildlife. William Morrow and Company, New York.

McCracken, K.G. and Sheldon, F.H. (1998). Molecular and osteological heron phylogenies: sources of incongruence. Auk. 115(1): 127–141.

McCrary, J.K. and Young, D.P. Jr. (2008). New and noteworthy observations of raptors in southward migration in Nicaragua. Orn. Neotropical. 19(4): 573–580.

McCrimmon, D.A. (1982). Populations of the Great Blue Heron Ardea herodias in New York State from 1964 to 1981. Colonial Waterbirds. 5: 87-95.

McGuire, H. L. (2002). Taxonomic status of the Great White Heron (Ardea herodias occidentalis): An analysis of behavioral, genetic, and morphometric evidence. Final report. Florida Fish and Wildlife Conservation Commission, Tallahassee, FL, USA.

McHenry, E. N. and J. C. Dyes. (1983). First record of juvenal 'white-phase' Great Blue Heron in Texas. American Birds 37 (1):119.

Mellink, E. and Palacios, E. (1993). Notes on breeding coastal waterbirds in northwestern Sonora. Western Birds. 24(1): 29–37.

Melvin, S. L., D. E. Gawlik and T. Scharff. (1999). Long-term movement patterns for seven species of wading birds. Waterbirds 22 (3):411-416.

Meyerriecks, A. J. (1957b). Field observations pertaining to the systematic status of the Great White Heron in the Florida Keys. Auk 74 (4):469-478.

Meyerriecks, A.J. (1960). Comparative Breeding Behavior of Four Species of North American Herons. Publications of the Nuttall Ornithological Club 2. Cambridge, MA.

Mikuska, T., J. A. Kushlan, and S. Hartley (1998). Key areas for wintering North American herons. Colonial Waterbirds 21:125–134.

Mitra, S. S. and John Fritz. (2002). Two Great White Herons (Ardea (herodias) occidentalis) in New York, Sep-Nov 2001. Kingbird 52 (1):27-34.

Mock, D. (1978a). Siblicide, parent-offspring conflict, and unequal parental investment by egrets and herons. Behavioral Ecology and Sociobiology 20:247-256.

Mock, D.W. (1976). Pair-formation displays of the Great Blue Heron. Wilson Bull.. 88: 185-230.

Mock, D.W. (1976). Social Behavior of the Great Blue Heron and Great Egret. PhD thesis, University of Minnesota, Minneapolis.

Mora, M. A. (1996). Organochlorines and trace elements in four colonial waterbird species nesting in the lower Laguna Madre, Texas. Archives of Environmental Contamination and Toxicology 31 (4):533-537.

Mott, D. F. (1978). "Control of wading bird predation at fish-rearing facilities." In Wading birds., edited by A. Sprunt Iv, J. C. Ogden and S. Winkler, 131-134. New York: Natl. Audubon Soc. Res. Rept. No. 7.

Murphy, M. (1988a). Status of Great Blue Heron colonies in King County, Washington. Western Birds 19:37-40.

Newbrey, J.L., Bozek, M.A. and Niemuth, N.D. (2005). Effects of lake characteristics and human disturbance on the presence of piscivorous birds in northern Wisconsin, USA. Waterbirds. 28(4): 478-486.http://www.bioone.org/doi/ full/10.1675/1524-4695%282005%2928%5B478%3AEOLCAH%5D2.0.CO %3B2

Nisbet, I. C. T. (2000). Disturbance, habituation, and management of waterbird colonies - Commentary. Waterbirds 23 (2):312-332.

Oberholser, H. C. (1912a). A revision of the forms of the Great Blue Heron (Ardea herodias Linnaeus). Washington D.C. Smithsonian Inst. Proc. U. S. Nation. Mus. 43:531-559.

Ogden, J.C. (1978). Recent population trends of colonial wading birds on the Atlantic and Gulf coastal plains. Pp. 137–153 in: Sprunt et al. (1978).

Ohlendorf, H. M., D. M. Swineford and L. N. Locke. (1981). Organochlorine residues and mortality of herons. Pesticides Monitoring Journal 14:125-135.

Palacios, E. and Mellink, E. (1993). Additional records of breeding birds from Montague Island, northern Gulf of California. Western Birds. 24(4): 259–262.

Palacios, E. and Mellink, E. (1995). Breeding birds of Esteros Tóbari and San José, southern Sonora. Western Birds. 26(2): 99–103.

Palmer, R. S. (Editor) (1962). Handbook of North American Birds. Volume 1. Yale University Press, New Haven, CT, USA.

Parker, M.S. (1993). Opportunistic predation by a Great Blue Heron on an American Dipper. Wilson Bull.. 105(4): 698-699.

Parkes, K. C. (1998). First record of the Great Blue Heron for Brazil. Colonial Waterbirds 21 (1):89-90.

Parkes, K.C. (1998). First record of the Great Blue Heron for Brazil. Colonial Waterbirds. 21(1): 89-90.

Parnell, J. F., D. G. Ainley, H. Blokpoel, B. Cain, T. W. Custer, J. L. Dusi, S. Kress, J. A. Kushlan, W. E. Southern, L. E. Stenzel and B. C. Thompson. (1988). Colonial waterbird management in North America. Colonial Waterbirds 11 (2):129-169.

Parsons, K. C. and A. C. McColpin. (1995). Great Blue Heron reproductive success in upper Delaware Bay. Journal of Field Ornithology 66 (2):184-191.

Parsons, K.C. and McColpin, A.C. (1995). Great Blue Heron reproductive success in upper Delaware Bay. J. Field Orn.. 66(2): 184-191.

Partch, M.L. (1990). Nesting of Great Blue Herons at the Cold Spring Heron Colony. St. Cloud State University, St. Cloud, Minnesota.

Payne, R. B. (1979). Family Ardeidae. In Check-list of Birds of the World (E. Mayr and G. W. Cottrell, Editors), Harvard University Press, Cambridge, MA, USA. pp. 193–243.

Payne, R. B., and C. J. Risley (1976). Systematics and evolutionary relationships among the herons (Ardeidae). Miscellaneous Publications, Museum of Zoology, University of Michigan 150.

Peresbarbosa, E. and E. Mellink. (2001). Nesting waterbirds of Isla Montague, northern Gulf of California, Mexico: Loss of eggs due to predation and flooding, 1993-1994. Waterbirds 24 (2):265-271.

Popotnik, G. J. and W. M. Giuliano. (2000). Response of birds to grazing of riparian zones. Journal of Wildlife Management 64 (4):976-982.

Powell, G. V. N. and A. H. Powell. (1986). Reproduction by Great White Herons Ardea herodias in Florida Bay as an indicator of habitat quality. Biological Conservation 36 (2):101-113.

Powell, G.V.N. and Powell, A.H. (1986). Reproduction by Great White Herons Ardea herodias in Florida Bay as an Indicator of Habitat Quality. Biological Conservation 36: 101-113.

Pratt, H.M. and Winkler, D.W. (1985). Clutch size, timing of laying, and reproductive success in a colony of Great Blue Herons and Great Egrets. Auk. 102(1): 49–63.

Pyle, P. (2005). Remigial molt patterns in North American Falconiformes as related to age, sex, breeding status, and life-history strategies. Condor 107:823–834.

Pyle, P. (2006). Staffelmauser and other adaptive strategies for wing molt in larger birds. Western Birds 37:179–185.

Pyle, P. (2008). Identification Guide to North American Birds, Part II: Anatidae to Alcidae. Slate Creek Press, Point Reyes Station, CA, USA.

Pyle, P. and Howell, S.N.G. (2004). Ornamental plume development and the ‘‘prealternate molts’’ of herons and egrets. Wilson Bull.. 116(4): 287–292.

Pyle, P., and S. N. G. Howell (2004). Ornamental plume development and the "prealternate molts" of herons and egrets. Wilson Bulletin 116:287–292.

Pétursson, G. (2010). Two records of Great Blue Heron in Iceland. British Birds. 103(6): 359.

Quinn, T. and R. Milner. (1999). The Great Blue Heron. Management recommendations for Washington's Priority Species. Vol IV: Birds.

Quinney, T. E. (1983a). Comparison of Great Blue Heron, Ardea herodias, reproduction at Boot Island and other Nova Scotia colonies. Canadian Field-Naturalist 97 (3):275-278.

Quinney, T.E. (1982). Growth, diet, and mortality of nestling Great Blue Herons. Wilson Bull.. 94: 571-577.

Ramo, C. and B. Busto. (1993). Resource use by herons in a Yucatan wetland during the breeding season. Wilson Bulletin 105 (4):573-586.

Ramo, C. and Busto, B. (1993). Resource use by herons in a Yucatan wetland during the breeding season. Wilson Bull.. 105(4): 573–586.

Rea, A. M., and L. L. Hargrave (1984). The bird bones from Stanton's Cave. In The Archeology, Geology, and Paleobiology of Stanton's Cave, Grand Canyon National Park, AZ (R. C. Euler, Editor), Mongraph 6, Grand Canyon Natural History Association. pp. 79–91.

Ritzi, C. M. and C. M. Ritzi. (2005). Carrion consumption by a great blue heron (Aves : Ardeinae). Bulletin of the Texas Ornithological Society 38 (1):17-18.

Rivers, J.W. and Kuehn, M.J. (2006). Predation of Eared Grebe by Great Blue Heron. Wilson J. Orn.. 118(1): 112–113.

Roberts, T. S. (1935). A manual for the identification of the birds of Minnesota and neighboring states. University of Minnesota Press, Minneapolis, MN, USA.

Rodgers, J.A. (1983). Foraging behaviour of seven species of herons in Tampa Bay, Florida. Colonial Waterbirds. 6(1): 11–23.

Rodgers, Jr., J. A. (1997). Pesticide and heavy metal levels of waterbirds in the Everglades Agricultural Area of south Florida. Florida Field Naturalist 25 (2):33-41.

Rodgers, Jr., J. A. and H. T. Smith. (1995b). Set-back distances to protect nesting bird colonies from human disturbance in Florida. Conservation Biology 9:89-99.

Rodgers, Jr., J. A. and S. T. Schwikert. (2002). Buffer-zone distances to protect foraging and loafing waterbirds from disturbance by personal watercraft and outboard-powered boats. Conservation Biology 16 (1):216-224.

Rubolini, D. and M. Fasola. (2008). Geographic patterns in reproductive parameters among Nearctic herons (Ardeidae). Auk 125 (2):374-383.

Russell, G.J., Bass, O.L. and Pimm, S.L. (2002). The effect of hydrological patterns and breeding-season flooding on the numbers and distribution of wading birds in Everglades National Park. Animal Conservation. 5: 185–199.

Sage, B. (1995). Great Blue Herons Ardea herodias and Magnificent Frigatebirds Fregata magnificens feeding on young turtles. Bull. Brit. Orn. Club. 115(1): 68.

Santaella, L. and Sada, A.M. (1991). The avifauna of the Revillagigedo Islands, Mexico: additional data and observations. Wilson Bulletin 103(4):668–675.http://sora.unm.edu/sites/default/files/journals/wilson/v103n04/p0668-p0675.pdf

Santiago-Alarcon, D., Arriaga-Weiss, S.L. and Escobar, O. (2011). Bird community composition of Centla Marshes Biosphere Reserve, Tabasco, Mexico. Orn. Neotropical. 22(2): 229–246.

Sauer, J. R., J. E. Hines and J. Fallon. (2003). The North American breeding bird survey, results and analysis 1966-2002. Version 2003.1.

Scheuhammer, A.M., Money, S.L., Kirk, D.A. and Donaldson, G. (2003). Lead Fishing Sinkers and Jigs in Canada: Review of Their Use Patterns and Toxic Impacts on Wildlife. Occ. Pap. 108. Canadian Wildlife Service, Ottawa.

Scott, D.A. and Carbonell, M. compilers. (1986). A Directory of Neotropical Wetlands. IWRB, Slimbridge & IUCN, Cambridge, UK.

Shaffer, F., Blanco Rodríguez, P., Robert, M. and Socarrás Torres, E. (2000). Observaciones y adiciones a la ornitofauna del Archipiélago Sabana-Camagüey, Cuba, 1998-2939393. Pitirre. 13(3): 76–81.

Sheldon, F. H. (1987a). A study of the evolution and phylogeny of the herons (Ardeidae) using DNA-DNA hybridization. Phd Thesis, Yale Univ., New Haven, CT.

Sheldon, F. H., C. E. Jones, and K. G. McCracken (2000). Relative patterns and rates of evolution in heron nuclear and mitochondrial DNA. Molecular Biology and Evolution 17:437–450.

Shugart, G. W., and S. Rohwer (1996). Serial descendant primary molt or Staffelmauser in Black-crowned Night-Herons. Condor 98:222–233.

Sibley, C. G., and B. L. Monroe, Jr. (1990). Distribution and Taxonomy of Birds of the World. Yale University Press, New Haven, CT, USA.

Simpson, K. and J. P. Kelsall. (1978). Capture and banding of adult Great Blue Herons at Pender Harbour, British Columbia. Proceedings of the Conference of the Colonial Waterbird Group 1978:71-78.

Simpson, K., Smith, J.N.M. and Kelsall, J.P. (1987). Correlates and consequences of coloniality in great blue herons. Canadian Journal of Zoology. 65: 572-577.

Sinclair, P. H., W. A. Nixon, C. D. Eckert, and N. L. Hughes (2003). Birds of the Yukon Territory. UBC Press, Vancouver, BC, Canada.

Skagen, S. K., C. P. Melcher and E. Muths. (2001). The interplay of habitat change, human disturbance and species interactions in a waterbird colony. American Midland Naturalist 145 (1):18-28.

Slud, P. (1964). The birds of Costa Rica: distribution and ecology. Bulletin of the American Museum of Natural History 128:1–430.http://digitallibrary.amnh.org/bitstream/handle/2246/1120//v2/dspace/ingest/pdfSource/bul/B128a01.pdf?sequence=1&isAllowed=y

Smith, A. R. (1996). Atlas of Saskatchewan Birds. Saskatchewan Natural History Society Special Publications 22, Regina, SK, Canada.

Smith, J.P. (1995). Foraging sociability of nesting wading birds (Ciconiiformes) at Lake Okeechobee, Florida. Wilson Bull.. 107(3): 437–451.

Snow, D. W., and C. M. Perrins, eds. (1998). The Birds of the Western Palearctic. Concise Edition. Volume 1. Non-passerines. Oxford University Press, Oxford, UK.

Snow, D.W. and Perrins, C.M. eds. (1998). The Birds of the Western Palearctic. Concise Edition. Vol. 1. Non-passerines. Oxford University Press, Oxford & New York.

Spalding, M. G., R. D. Bjork, G. V. N. Powell and S. F. Sundlof. (1994b). Mercury and cause of death in Great White Herons. Journal of Wildlife Management 58 (4):735-739.

Squires, J.R. (1998). Attempted kleptoparasitism of Ospreys by Great Blue Herons. Wilson Bull.. 110(4): 560.

Stabins, A. J., K. J. Raedeke and D. A. Manuwal. (2006). Productivity of Great Blue Herons in King County, Washington. Northwest Science 80 (2):116-119.

Stapanian, M.A. and Waite, T.A. (2003). Species density of waterbirds in offshore habitats in western Lake Erie. J. Field Orn.. 74(4): 381–393.

Steinmetz, J., Kohler, S.L. and Soluk, D.A. (2003). Birds are overlooked top predators in aquatic food webs. Ecology. 84(5): 1324–1328.

Stevenson, H. M., and B. H. Anderson (1994). The Birdlife of Florida. University Press of Florida, Gainesville, FL, USA.

Straub, C. L., J. D. Maul, R. S. Halbrook, B. Spears and M. J. Lydy. (2007). Trophic transfer of polychlorinated biphenyls in Great Blue Heron (Ardea herodias) at Crab Orchard National Wildlife Refuge, Illinois, United States. Archives of Environmental Contamination and Toxicology 52 (4):572-579.

Stresemann, E., and V. Stresemann (1966). Die Mauser der Vögel. Journal für Ornithologie 107, Sonderheft.

Sullivan, J. P. and S. M. Payne. (1988). Aspects of history and nestling mortality at a Great Blue Heron, Ardea herodias, colony, Quetico Provincial Park, Ontario. Canadian Field-Naturalist 102 (2):237-241.

Sullivan, J.P. and Payne, S.M. (1988). Aspects of the history and nestling mortality at a Great Blue Heron, Ardea herodias, colony, Quetico Provincial Park, Ontario. Can. Field-Naturalist 102: 237-241.

Swash, A. and Still, R. (2000). Birds, Mammals & Reptiles of the Galápagos Islands. An Identification Guide. Pica Press & WILDGuides, Nr. Robertsbridge & Hampshire, UK.

Telfair II, R. C. and D. A. Swepston. (1987). Analysis of banding and marking nestling Anhingas, Olivaceous Cormorants, Roseate Spoonbills, ibises, bitterns, herons, and egrets in Texas (1923-1983). Austin: Texas Parks Wildl. Dept.

Telfair, R. C. II. (2001a). Great Blue Heron. The Texas Breeding Bird Atlas.

Telford, S. R., M. G. Spalding and D. J. Forrester. (1992). Hemoparasites of wading birds (Ciconiiformes) in Florida. Canadian Journal of Zoology 70 (7):1397-1408.

Terres, J.K. (1980). The Audubon Society Encyclopedia of North American Birds. Alfred A. Knopf, New York.

Thomas, C. M. and R. G. Anthony. (1999). Environmental contaminants in Great Blue Herons (Ardea herodias) from the lower Columbia and Willamette rivers, Oregon and Washington, USA. Environmental Toxicology and Chemistry 18 (12):2804-2816.

Tucker, V. A. (1991). The effect of molting on the gliding performance of a Harris' Hawk (Parabuteo unicinctus). Auk 108:108–113.

Tufts, R. W. (1961). The birds of Nova Scotia. Halifax: Nova Scotia Mus.

Vennesland, R. G. (2000). The effects of disturbance from humans and predators on the breeding decisions and productivity of the Great Blue Heron in south-coastal British Columbia. M.S. thesis, Simon Fraser University, B.C.

Vennesland, R. G. (2004). Great Blue Heron, Ardea herodias. Identificed Wildlife Mangement Strategy guidelines.

Vennesland, R. G. (2010). Risk perception of nesting Great Blue Herons: experimental evidence of habituation. Canadian Journal of Zoology 88 (1):81-89.

Vennesland, R. G. and R. W. Butler. (2004). Factors influencing Great Blue Heron nesting productivity on the Pacific Coast of Canada from 1998 to 1999. Waterbirds 27 (3):289-296.

Vermeer, K. (1970d). Insular Great Blue Heron colonies on large Manitoba lakes. Blue Jay 28:84-86.

Voisin, C. (1991). The Herons of Europe. T. & A. D. Poser, London, United Kingdom.

Watts, B. D. and D. S. Bradshaw. (1994). The influence of human disturbance on the location of Great Blue Heron colonies in the lower Chesapeake Bay. Colonial Waterbirds 17 (2):184-186.

Watts, B.D. and Bradshaw, D.S. (1994). The influence of human disturbance on the location of Great Blue Heron colonies in the lower Chesapeake Bay. Colonial Waterbirds. 17(2): 184-186.

Wauer, R.H. and Wunderle, J.M. (1992). The effect of Hurricane Hugo on bird populations on St. Croix, U.S. Virgin Islands. Wilson Bull.. 104(4): 656–673.

Webb, R. S. and L. S. Forbes. (1982). Colony establishment in an urban site by Great Blue Herons. Murrelet 63 (3):91-92.

Werschkul, D. F., E. McMahon and M. Leitschuh. (1976). Some effects of human activities on the Great Blue Heron in Oregon. Wilson Bulletin 88:660-662.

Wetmore, A. (1965). The Birds of the Republic of Panama. Vol. 1. Tinamidae (Tinamous) to Rynchopidae (Skimmers). Smithsonian Miscellaneous Collections 150. Smithsonian Institution, Washington, D.C. 483 pp.

Williams, B., D. F. Brinker and B. D. Watts. (2007a). The status of colonial nesting wading bird populations within the Chesapeake Bay and Atlantic barrier Island-Lagoon system. Waterbirds 30:82-92.

Witt, J. W. (2006). Great Blue Heron productivity at Mason Neck National Wildlife refuge in Northern Virginia, and the potential impacts of weather during a 13-year interval. Waterbirds 29 (3):345-349.

Woodward, H. D. and R. W. Trussell. (2003). Lone Harris's Hawk kills Great Blue Heron. Journal of Raptor Research 37 (1):85-86.

Zickefoose, J. and Davis, W.E. (1998). Great Blue Heron (Ardea herodias) uses bread as bait for fish. Colonial Waterbirds. 21(1): 87-88.

Zickefoose, J. and W. E. Davis. (1998). Great Blue Heron (Ardea herodias) uses bread as bait for fish. Colonial Waterbirds 21 (1):87-88.

Ziegler, A. F., S. C. Welte, E. A. Miller and T. J. Nolan. (2000). Eustrongylidiasis in eastern Great Blue Herons (Ardea herodias). Avian Diseases 44 (2):443-448.

Recommended Citation

Vennesland, R. G. and R. W. Butler (2020). Great Blue Heron (Ardea herodias), version 1.0. In Birds of the World (A. F. Poole, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.grbher3.01