Feathers are among the most complex cutaneous appendages in the animal kingdom. While their evolutionary origin has been ...

Cranial kinesis allows modern birds to eat a wider variety of foods and use their beaks as multifunctional tools.

Modern birds are the living relatives of dinosaurs. Take a look at the features of flightless birds like chickens and ...

Yet birds differ from their reptile ancestors in many important ways. A turning point in their evolution was the development of larger brains, which in turn led to changes in the size and shape of ...

Scientists suggest that bigger brains in bird ancestors led to more flexible skulls, playing a key role in their evolution.

The evolution of insect-eating birds may have spurred rapid changes in the flight ability of ancient cicadas, according to ...

Mutated H5N1 Bird Flu Found in Cats: Scientists have identified a genetic mutation in two infected cats that is linked to ...

The H5N1 avian influenza virus is mutating to evade immune defenses in mammals following prior infection or vaccination.

Brain activity in vocalizing budgerigar parrots showed a pattern that harkened to those found in the brains of people.