Why We Didn't Know That Female Birds Sing - Scientific American
Quail Bird Facts (Coturnix coturnix)
An Eagle Who Adopted a Rock Becomes a Real Dad - The New York Times
Parrots, Popular Pet Birds, Threatened by Illegal Trade
About - California Condors (U.S. National Park Service)
Dove Birds - All You Need to Know About this Symbolic Pet Bird!
Osprey National Wildlife Federation
Painted Bunting Audubon Field Guide
How birds become male or female, and occasionally both
Same-Sex Mothers: Letting Albatrosses Be Albatrosses
Why Do Male Birds Feed Female Birds? An Exploration Of