Bird Websites:
Bird Collections
Checklist of Costa Rica Birds
Cornell University Ornithology Collection
Florida Museum of Natural History, Pierce Brodkorb Ornithology Collection
Manchester Museum
Natural History Museum of Los Angeles County -- Ornithology
Peabody Museum, Yale University, Ornithology Collections
The Slater Museum, University of Puget Sound, Tacoma, Washington
University of Bergen Department of Zoology
World Inventory of Anatomical Specimens
List of Hummingbird Organizations
The National Audubon Society
The Ornithological Council
The Turkey Vulture Society
Washington State Ornithological Society