U.S. birds display a wide array of striking hues. But just how colorful are our American birds? What you need to know from ...

For a reddish-beaked bird called the zebra finch, sexiness is color-coded. Males have beaks that range from light orange to dark red. But to females, a male's colored bill may simply be hot, or ...

In the bird world, the color red has special significance. Many species use red signals to attract mates or deter rivals, adding the color to their beaks, feathers, or bare skin. As far as many ...

An American robin perched on a limb puffs its maroon-red chest proudly. The male northern cardinal boasts spectacular red plumage from head to tail, offset by his coal-black face. How fitting that ...

Why Yellow Birds Mysteriously Turn Red. No one could figure out why a North American woodpecker's feathers were changing color—until now.

While humans have three color cones in the retina sensitive to red, green and blue light, birds have a fourth color cone that can detect ultraviolet light. A Princeton-led research team trained wild ...

Scientists have speculated for years on how birds obtained their colors, but the Yale/Cambridge study was the first to ask what the diversity of bird colors actually look like to birds themselves.

Throughout those centuries of breeding canaries, one color remained elusive—red. The birds traversed the rainbow, but no hint of red had ever shown up in their feathers.

DURHAM, N.C. -- For a small, reddish-beaked bird called the zebra finch, sexiness is color-coded. Males have beaks that range from light orange to dark red. But from a female's point of view, a ...