The AOS Checklist of North and Middle American Birds provides the taxonomic and nomenclatural foundation for bird research, conservation, and education in North and Middle America. It is used by scientific researchers, federal, state, and local government agencies, non-profit organizations, birdwatchers, and anyone else interested in birds of this region. It is overseen by AOS’s North American Classification Committee (NACC).
Recommended citation: Chesser, R. T., S. M. Billerman, K. J. Burns, C. Cicero, J. L. Dunn, B. E. Hernández-Baños, R. A. Jiménez, A. W. Kratter, N. A. Mason, P. C. Rasmussen, J. V. Remsen, Jr., and K. Winker. 2023. Check-list of North American Birds (online). American Ornithological Society. https://checklist.americanornithology.org/
The geographic area covered by the AOS Checklist includes North and Central America from the North Pole to the boundary of Panama and Colombia, including the adjacent islands under the jurisdiction of the included nations; Greenland; the Hawaiian Islands; Clipperton Island; Bermuda; the West Indies, including the Bahama Islands, the Greater Antilles, Leeward and Windward Islands in the Lesser Antilles (ending with Grenada); and Swan, Providencia, and San Andrés Islands in the Gulf of Mexico.
AOS Checklist: 7th Edition and Supplements
In addition to accessing the online version of the checklist through the link above, the 829-page hardbound volume, published in 1998, may be purchased from Buteo Books or downloaded in PDF format (file size up to 13 MB):
- Tinamiformes – Falconiformes
- Galliformes – Charadriiformes
- Pteroclididae – Apodiformes
- Trogoniformes – Passeriformes
- Passeriformes: Incertae Sedis – Mimidae
- Sturnidae – Estrildidae
- Appendix, French names, Supplement listing, Literature Cited and Index
These documents do not incorporate changes made in the annual supplements to the Checklist. Users of the book must check the supplements or online list to determine whether changes have been made.
Individual open-access supplements published since the 7th edition:
- 64th Supplement, Ornithology 2023, vol. 140:ukad023
- 63rd Supplement, Ornithology 2022, vol. 139:ukac020
- 62nd Supplement, Ornithology 2021, vol. 138:ukab037
- 61st Supplement, Auk 2020, vol. 137:ukaa030
- 60th Supplement, Auk 2019, vol. 136:ukz042
- 59th Supplement, Auk 2018, vol. 135:798-813
- 58th Supplement, Auk 2017, vol. 134:751-773
- 57th Supplement, Auk 2016, vol. 133:544-560
- 56th Supplement, Auk 2015, vol. 132:748-764
- 55th Supplement, Auk 2014, vol. 131:CSi-CSxv
- 54th supplement, Auk 2013, vol. 130:558-571
- 53rd Supplement, Auk 2012, vol. 129:573-588
- 52nd Supplement, Auk 2011, vol. 128:600-613
- 51st Supplement, Auk 2010, vol. 127:726-744 (and Errata)
- 50th Supplement, Auk 2009, vol. 126:705-714
- 49th Supplement, Auk 2008, vol. 125:758-768
- 48th Supplement, Auk 2007, vol. 124:1109-1115
- 47th Supplement, Auk 2006, vol. 123:926-936
- 46th Supplement, Auk 2005, vol. 122:1026-1031
- 45th Supplement, Auk 2004, vol. 121:985-995
- 44th Supplement, Auk 2003, vol. 120:923-931
- 43rd Supplement, Auk 2002, vol. 119:897-906
- 42nd Supplement, Auk 2000, vol. 117:847-858
The last edition of the Check-list to include subspecies was published in 1957 (5th edition). For reasons of expediency, the Committee reluctantly excluded treatment of subspecies in both the 6th and 7th editions, although it continues to endorse the biological reality and practical utility of subspecies as a taxonomic rank. Subspecies that reflect biological diversity play an important role in flagging the attention of evolutionary, behavioral, ecological, and conservation biologists.
Although a complete revision of North American avian subspecies has not been done, we refer readers to Avibase, Clements, and other checklists (see below), as well as to Birds of North America, for more up-to-date treatments of subspecies. The Birds of North America project is systematically revising subspecies accounts for North American birds.