More than 99% of birds can fly. But that still leaves many species that evolved to be flightless, including penguins, ...

Slow-motion footage of baby birds helps scientists uncover how their ancestors took to the skies. Birds today make flight look effortless, but its evolution was complex. Scientists are still trying to ...

Swifts practically live in the sky. These birds skip land for nearly a year, doing everything midair, from eating to sleeping ...

Thousands of birds are expected to migrate over the Chicago area overnight, triggering a “Migration Alert” to help protect the flying travelers. According to BirdCast, a service powered by a variety ...

Researchers examined dozens of bird species in museum collections looking for differences in the feathers and bodies between birds that can fly and birds that can't. They found that when birds evolve ...

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 new study in the journal Evolution, researchers ...