We often spot birds soaring through the skies, gliding with effortless ease, flapping across oceans, or flocking through trees. And one of the most iconic aspects that help the birds through this is ...

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 ...