Birds of the World The Cornell Lab of Ornithology - à descoberta do mundo das aves
Macaulay Library The Cornell Lab of Ornithology - arquivo científico de audio, video e fotografia de história natural
All About Birds The Cornell Lab of Ornithology - inclui Merlin Bird ID app
The Internet Bird Collection (integrado na Macaulay Library desde 2020)
Flickr Field Guide Birds of the World
Neotropical Birds (integrado em Birds of the World desde 2020)
BTO bird identification videos
Slater Museum of Natural History, University of Puget Sound, WA - asas e caudas