"The reason that a bird's egg's yolk is a bright yellow-orange is because it's full of carotenoids," says Corbo. "And so then, during development, the bird mobilizes the carotenoids from the yolk ...

The sun conure, or sun parakeet (Aratinga solstitialis), is a lovely yellow-and-orange bird that is native to South America. While it has been spotted across the continent, it is most often found ...

“For a century, scientists puzzled over the mechanisms that enable parrots to produce red or yellow coloration, even as the genes that control melanin, carotenoid, and even structural coloration ...

One enzyme has a key role in determining whether parrots’ rainbow plumage ... For instance, equal ratios of red and yellow molecules should produce orange feathers, Corbo says.

A rare bird with a stunning yellow crest has been photographed for ... Their eyes are surrounded by distinctive orange tissue called a wattle. After going unseen for many years, the helmetshrike ...

Orange-bellied parrots (Neophema chrysogaster ... a subspecies that diverged from the yellow-tufted honeyeater about 56,000 years ago, was reduced to less than 200 birds a few years ago.

However, their most striking feature is their yellow crown consisting of a long plume. The ponytail, as well as the dark grey feathers on the bird's neck, are referred to as plumaceous feathers.

Recent studies show that certain feather pigments can help neutralize toxic pollution. It means darker, duller birds could have a survival advantage. By Marta Zaraska Some popular city dwellers ...

Six years ago, an Alabama photographer’s photos of a rare yellow cardinal captivated the nation on numerous national news outlets after being first reported on AL.com. Now, a bird with the same ...