бібліотека електронних та каталог паперових книг

Why is a cardinal red or a bluebird blue? Why do some birds have plumage that is intensely colored—is it pigment, light, gender, robust health, or some combination of all four? What roles do disease, climate, and wear and tear play in this process? What does feather display signal about sexual attraction and social status? How has color camouflage evolved?
These are just a few of the fascinating questions explored here in the first non-academic work on coloration and plumage, and their key role in avian life.