Optical illusions have gained popularity once again and keep popping up online, and the one with the bird is making people scratch their heads. A picture shows a bunch of bright birds sitting together ...

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 ...