Your fingernails and a bird beak have something in common: They both consist of a protein called keratin. The keratin layer over bone gives beaks their glossy appearance. As the keratin wears down ...

Under these drastically changing conditions, the struggle to survive favored the larger birds with deep, strong beaks for opening the hard seeds. Smaller finches with less-powerful beaks perished.

Along its red beak, the bird has a faded flesh-toned red that ... and you get quite an unforgettable appearance. Most importantly, you can identify the duck with the ear-piercing calls.

After surviving a likely gunshot wound in July, a bald eagle in Missouri is showing an important sign of recovery–keratin ...

The outer sheaths of birds’ beaks grow continually throughout their ... blobby, jelly-like appearance. Nostoc belongs to the cyanobacteria – a very ancient group of organisms which are capable ...

Birds have feathers and a beak and lay hard-shelled eggs. Many birds are able to fly using their wings, but others such as ostriches are flightless and unable to fly. Some birds like penguins ...