More than 99% of birds can fly. But that still leaves many species that evolved to be flightless, including penguins, ostriches, and kiwi birds. In a study in the journal Evolution, researchers ...

Bird flight originated on a single evolutionary ladder leading from dinosaurs to birds. New fossils are shaking up this ...

According to bird experts Kenn and Kimberly Kaufman, much about bird flying is dependent on the species, season, and what else the bird is doing. Songbirds that feed on insects vary in the elevation ...

I glance at the feather in my hand, thoughts drifting to the dinosaurs that were among the first feathered animals ...

A green head, a white collar, and a yellow beak. The male mallard is easy to recognize just by its color combination. However ...