Checklists & Taxonomy

AOUThe Birds of North and Middle America Checklist is the official source on the taxonomy of birds found in North and Middle America, including adjacent islands. This list is produced by the North American Classification Committee (NACC), an official committee of the American Ornithologists' Union.
BIRD FAMILIES OF THE WORLDThe purpose of Bird Families of the World is as an aid to world birders who want to maximize their enjoyment of avian diversity by observing examples of as many bird families as is reasonable within the time and money available for travel, and as a study tool for all interested readers.
BBRCThe British Birds Rarities Committee (BBRC) is the official adjudicator of rare bird records in Britain.
BOUThe BOU maintains the British List, the official list of wild birds records in Great Britain (England, Scotland and Wales and associated waters). The List is managed by the BOU’s Records Committee (BOURC).

Census of South Australian Vertebrates - Birds. The list includes all species of birds reliably recorded as free-living forms from South Australia during the period of European settlement.
A CLASSIFICATION OF THE BIRDS OF SOUTH AMERICAA Classification of the Bird Species of South America.
CornellThe Clements List maintained by The Cornell Lab of Ornithology is an ever-changing list of species, subspecies, English names, and approximate distributions.
IOC WORLD BIRD LISTThe IOC World Bird List is an open access resource of the international community of ornithologists.
TAXONOMY IN FLUXTaxonomy in Flux Checklist is based on genetic studies to the highest degree. possible.
BirdLifeAustraliaWorking List of Australian Birds defines, and names, all known Australian bird species and subspecies.
ZOONOMENZoonomen. Zoological Nomenclature Resource.