Learn what America's most venerable ornithological institution has discovered about birds in its past 100 years of study.

In the first days of spring, birds undergo a spectacular metamorphosis. After a long winter of migration and peaceful coexistence, they suddenly begin to sing w

Meet the ladies: a flock of smart, affectionate, highly individualistic chickens who visit their favorite neighbors, devise different ways to hide from foxes, a

Why is a cardinal red and a bluebird blue? How has color camouflage evolved? These are just a few of the fascinating questions explored in this work on colorati