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The Cornell Lab of Ornithology
All About Birds
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Archive of Tag: eggs
Behavior
Evolution
Fancy Males & Choosy Females
Anatomy
Feathers
What is Unique to Birds?
Nesting
Blyth's Paradise-Flycatchers Alternate Nest Responsibilities
Nesting
A Bluethroat Feeds and Broods Chicks on Its Nest
Nesting
A Female Rock Ptarmigan Sits on Her Nest
Nesting
A Red-necked Grebe Sits on Its Nest
Behavior
Nesting
King Penguins Incubating Eggs on Their Feet