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

Biofluorescence is widespread in birds-of-paradise, a group of tropical birds famous for their spectacular courtship dances.

"Bird feathers have the advantage that the structures ... using them in the end is pretty efficient," Marschner said. "You ...

Feathers are among the most complex cutaneous appendages in the animal kingdom. While their evolutionary origin has been ...

But that still leaves many species that evolved to be flightless, including penguins, ostriches, and kiwi birds. In a new study in the journal Evolution, researchers compared the feathers and ...