The white silk nests that are often destroyed by people are actually an important factor in the life of the eastern tent ...

When red-billed and yellow-billed finches mate, their offspring have orange bills. By studying the exact shade of orange in ...

If you've ever seen an Australian finch, you know that it has a brightly colored red, orange, or yellow bill. But how and why do these birds develop one color over another? A new study has ...