Fossils of alvarezsaurid dinosaurs show bird-like air sacs in their bones. Scans revealed hollow spaces connected to their ...

Answer: Birds do not have the sex organs common to mammals. Instead, both male and female birds have what's known as a cloaca ...

The Wright Brothers studied bird flight before they designed the first airplane. Now modern aircraft fly higher and faster ...

Chickens treated to inhibit the sonic hedgehog (Shh) pathway during development grow feathers that resemble ancient ...

Why is this pigeon pink? We break down the mystery — plus, birding experts advise what to do if you see a pink bird that ...

The possession of feathers and other parts of native North American birds without a permit is banned by the Migratory Bird ...