Not globally threatened (Least Concern). Recognized as two species by BirdLife International (10 del Hoyo, J., and N. J. Collar (2016). HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2. Lynx Edicions, Barcelona, Spain. Close ), Black-and-red Broadbill (C. macrorhynchos) and monotypic Irrawaddy Broadbill (C. affinis) are both considered Least Concern under IUCN criteria. Some populations are relatively secure, occurring in several protected areas, e.g., Nam Bai Cat Tien National Park in Vietnam (62 Robson, C. R. (1991). The avifauna of Nam Cat Tiem National Park, Dong Nai. Garrulus 8:4–9. Close ), Taman Negara National Park and Panti Forest in Peninsular Malaysia (13 Medway, Lord, and D. R. Wells (1976). The Birds of the Malay Peninsula. Volume 5. Conclusions and Survey of Every Species. Witherby & Penerbit University Malaya, London & Kuala Lumpur. Close , 2 Wells, D. R. (2007). The Birds of the Thai-Malay Peninsula. Volume 2. Passerines. Christopher Helm, London, UK. Close ), Gunung Leuser and Way Kambas National Parks on Sumatra (36 van Marle, J. G., and K. H. Voous (1988). The Birds of Sumatra. An Annotated Check-list. B.O.U. Check-list 10. British Ornithologists’ Union, Tring, UK. Close , 63 Parrott, S., and P. Andrew (1996). An annotated checklist of the birds of Way Kambas National Park, Sumatra. Kukila 8:57–85. Close ), and Similajau and Tanjung Puting National Parks on Borneo (64 Gore, M. E. J. (1968). A check-list of the birds of Sabah, Borneo. Ibis 110(2):165–196. Close , 58 Nash, S. V., and A. D. Nash (1988). An annotated checklist of the birds of Tanjung Puting National Park, Central Kalimantan. Kukila 3(3–4):93–116. Close , 46 Smythies, B. E. (1999). The Birds of Borneo. Fourth edition revised by G. W. H. Davison. Natural History Publications, Kota Kinabalu, Borneo. Close , 48 Mann, C. F. (2008). The Birds of Borneo. An Annotated Checklist. B.O.U. Checklist 23. British Ornithologists’ Union & British Ornithologists’ Club, Peterborough, UK. Close ).

Throughout its range, it was formerly very common to abundant, but the species has decreased considerably, especially in its northern range, in response to lowland deforestation. However, this broadbill’s tolerance of logged areas and second growth makes it unlikely to be under immediate threat (65 Round, P. D. (1988). Resident Forest Birds in Thailand: their Status and Conservation. Monograph 2. International Council for Bird Preservation, Cambridge, UK. Close , 66 Wells, D. R. (1985). The forest avifauna of western Malesia and its conservation. In Conservation of Tropical Forest Birds (A. W. Diamond, and T. E. Lovejoy, Editors), International Council for Bird Preservation Technical Publication 4, Cambridge, UK. pp. 213–232. Close ). It is no longer common in Thailand (50 Lekagul, B., and P. D. Round (1991). A Guide to the Birds of Thailand. Saha Karn Bhaet Co., Bangkok, Thailand. Close ), despite reportedly being abundant along rivers in the early 20th century (67 Robinson, H. C. (1915). Birds collected by Mr. C. Boden Kloss on the coast and islands of south-eastern Siam. Ibis (10)3:718–761. Close ); and it is now considered the scarcest species of broadbill there (1 Lambert, F. R., and M. Woodcock (1996). Pittas, Broadbills and Asities. Pica Press, Robertsbridge, UK. Close ). Also scarce over most of Indochina (where first recorded in Laos as recently as the early 1990s) (68 Robson, C. R. (1993). From the field. Laos. Bulletin of the Oriental Bird Club 17:51–52. Close ), but now known to be locally numerous, even in degraded forest, e.g., in southern Laos (29 Thewlis, R. M., J. W. Duckworth, G. Q. A. Anderson, M. Dvorak, T. D. Evans, E. Nemeth, R. J. Timmins, and R. J. Wilkinson (1996). Ornithological records from Laos, 1992–1993. Forktail 11:47–100. Close , 30 Thewlis, R. M., R. J. Timmins, T. D. Evans, and J. W. Duckworth (1998). The conservation status of birds in Laos: a review of key species. Bird Conservation International 8(Supplement):1–159. Close , 32 Evans, T. D., H. C. Towll, R. J. Timmins, R. M. Thewlis, A. J. Stones, W. G. Robichaud, and J. Barzen (2000). Ornithological records from the lowlands of southern Laos during December 1995–September 1996, including areas on the Thai and Cambodian borders. Forktail 16:29–52. Close ) and Cambodia (69 Delacour, J. (1929). On the birds collected during the Fourth Expedition to French Indo-China. Part 2. Ibis 71(3):403–429, pls. 7–9. Close , 70 Delacour, J., and P. Jabouille (1940). Liste des Oiseaux de l’Indochine Française. Oiseau et Réseau Français d'Ornithologie 1–2:1–132. Close , 25 Engelbach, P. (1953). Les oiseaux d’Angkor et leur identification sur le terrain. Terre et Vie 100:148–166. Close ). In Myanmar, C. affinis is believed to still be reasonably common where suitable habitat remains (including well-vegetated gardens), especially in coastal areas and on small offshore islands, but very few data or recently published observations are available to confirm this (15 Smith, H. C. (1943). Notes on Birds of Burma. Liddells Printing Works, Simla. Close , 16 Smythies, B. E. (1986). The Birds of Burma. Third revised edition. Nimrod Press, Liss, UK. Close ).

On Borneo, the species is rather common in the lowlands, but scarce in forest interior and at higher elevations (64 Gore, M. E. J. (1968). A check-list of the birds of Sabah, Borneo. Ibis 110(2):165–196. Close , 71 Pearson, D. L. (1975). A preliminary survey of the birds of the Kutai Reserve, Kalimantan Timur, Indonesia. Treubia 28:157–162. Close , 47 Sheldon, F. H., R. G. Moyle, and J. Kennard (2001). Ornithology of Sabah: History, Gazetteer, Annotated Checklist, and Bibliography. Ornithological Monographs 52. American Ornithologists’ Union, Washington, D.C., USA. Close ). On Sumatra, van Marle and Voous (36 van Marle, J. G., and K. H. Voous (1988). The Birds of Sumatra. An Annotated Check-list. B.O.U. Check-list 10. British Ornithologists’ Union, Tring, UK. Close ) reported Black-and-red Broadbill to be the commonest species of broadbill; but Holmes (72 Holmes, D. A. (1996). Sumatra Bird Report. Kukila 8(1):9–56. Close ) suggested that this species, while still widely distributed, is now very scarce on the island. Recent data from there suggest that this species, like most passerines in the region, is trapped for the songbird trade (73 Shepherd, C. R. (2006). The bird trade in Medan, north Sumatra: an overview. BirdingASIA 5:16–24. Close ), with one bird on Java recently offered for sale for $25.75 USD (74 Chng, S. C. L., J. A. Eaton, K. Krishnasamy, C. R. Shepherd, and V. Nijman (2015). In the Market for Extinction: An Inventory of Jakarta’s Bird Markets. TRAFFIC, Petaling Jaya, Selangor, Malaysia. Close ). In the Thai-Malay Peninsula, it has also been affected by hunting (2 Wells, D. R. (2007). The Birds of the Thai-Malay Peninsula. Volume 2. Passerines. Christopher Helm, London, UK. Close ).