A cholangiocarcinoma in a 3 1/2-year-old yellow-faced Amazon parrot (Amazona xanthops) is reported. The parrot presented with a prolapsed cloaca and died after a 6-week clinical course of progressive ...

“You have to ask why birds would do this,” says Joe Corbo, a biologist at Washington University in St. Louis. “And one of the leading hypotheses is that the male has elaborate ornaments or colors that ...

PThere are many colorful birds in the world but yellow parrots stand out like golden sunshine in the sky as their beauty is so bright that when people first see them many think they are painted and ...

Lights. Camera. Action! Yellow-headed parrots, also called yellow-headed Amazons, may be the drama divas of the bird world. Definitely not timid or shy, these parrots are very inquisitive and social.

Some birds are feathered tufts of color so resplendent that they stand out brilliantly from their surroundings. "You have to ask why birds would do this," says Joe Corbo, a biologist at Washington ...