If optimists see the world through rose-colored lenses, some birds see it through ultraviolet ones. Avians have evolved ultraviolet vision quite a few times in history, a new study finds. Birds depend ...

Structures and functions of bird’s eye. (a) Bird vision. (b) Deep central fovea and four types of cones. (c) Foveated vision and tetrachromatic vision. The eyes of raptors such as eagles can ...

Each year, millions of birds fly into power lines, wind turbines and the other man-made structures that litter the open air space. These collisions frequently result in the death of birds and, if ...

Jim Wilson/The New York Times. For some blind birders, avian soundscapes are a way to map the world around them. Increasing noise pollution is imperiling that navigation. By Alexandra Marvar Aug. 3, ...