Great Blue Heron Ardea herodias
Version: 1.0 — Published March 4, 2020
Text last updated April 28, 2011
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We thank Darin Bennett, Ed Bruckner, Ian Moul, Max Partch, Bill Scharf and Marilyn Sigman for use of unpublished data, and Range Bayer, Alan Poole and Peter Stettenheim for helpful comments on this manuscript. Bob Chandler wrote the section on fossil history. The Christmas Bird Count and Breeding Bird Survey databases depend on input from volunteers across the continent.