What determines how big a flying bird can be? The answer, in part, is the time it takes for the creatures to replace their feathers, researchers have found. The study, published Tuesday in the ...

In a study in the journal Evolution, researchers compared the feathers and bodies of different species of flightless birds ...

Dark feathers may help birds fly more efficiently. They heat up the animals’ wings and the surrounding air, which might help increase airflow over the wing. Svana Rogalla at Ghent University in ...

Two tiny wings entombed in amber reveal that plumage (the layering, patterning, coloring, and arrangement of feathers) seen in birds today already existed in at least some of their predecessors ...