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- Bird - Wikipedia
The digestive and respiratory systems of birds are also uniquely adapted for flight Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming The study of birds is called ornithology
- Boulder, Colorado, United States - eBird
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- Guide to North American Birds | Audubon
Explore more than 800 North American bird species, learn about their lives and habitats, and how climate change is impacting their ability to survive
- Bird | Description, Species, Feathers, Facts | Britannica
Bird, any of the more than 10,400 living species unique in having feathers, the major characteristic that distinguishes them from other animals They are warm-blooded vertebrates more related to reptiles than mammals
- Online bird guide, bird ID help, life history, bird sounds from Cornell . . .
Use our Bird Guide to identify birds, learn about the life history, listen to the sounds, and watch bird behavior on video--the most comprehensive guide to Nort
- Bird Pictures Facts - National Geographic
Birds are found worldwide and in all habitats The largest is the nine-foot-tall ostrich The smallest is the two-inch-long bee hummingbird Everything about the anatomy of a bird reflects its
- All About Birds | Birds, Cornell Lab of Ornithology
All About Birds is your free online guide to birds and bird watching Explore in-depth species information, tips from the Lab’s experts, and inspirational v
- Boulder County Birds — Boulder County Audubon
Stephen Jones collated all the status, population, and conservation information for each bird A list of all the photographic contributors is at the end of this page The distribution and status of birds in Boulder County is ever-changing
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