Biofluorescence is widespread in birds-of-paradise, a group of tropical birds famous for their spectacular courtship dances.

New feathers, known as pin feathers, will prick through the bird’s skin in small, stiff shafts. They can appear a little odd, but they’re completely normal. 3.

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

In the molting season, birds will lose feathers and grow new feathers. You will probably see roosters losing tail feathers and you might also see pin feathers – which are the new feathers ...