Birds are some of the brightest and most colorful animals on Earth. The blues, reds, greens, purples and yellows of the avian world are rivaled, among vertebrates, only by the brilliant colors and ...

Many tropical birds are colorful, but scarlet macaws stand out for their size and their brilliant red coloring. These birds are mostly red with mixed feathers of bright blue, yellow, and green.

Birds acquire some pigments, such as carotenoids, by eating fruits, seeds, or insects. Carotenoids produce the bright reds, yellows, and oranges seen in birds, and they are the same pigments that ...

A colorful surprise. Living birds are technically a specialized group of dinosaurs, and the model indicated that the common ancestor of all the birds alive today had the iridescent feathers that ...