Plastic waste has let common coots reuse nests year after year. Scientists have now used the trash layers to date how old nests are.

Modern birds, along with certain snakes and fishes, have skulls whose jaws and palates are not firmly fixed in place.

At the 12th day of incubation, feather buds exhibit longitudinal domains of cell density that correspond to the barbs of the future down feather.

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.