Get unlimited access to ad-free articles and exclusive content. LiveScience If optimists see the world through rose-colored lenses, some birds see it through ultraviolet ones. Avians have evolved ...

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 research team trained wild hummingbirds to ...

"Contributions have been based around presentations at the Second European Conference of Avian Colour Vision and Coloration, in Paris"--P. S2. "Supplement to The American naturalist, volume 169, ...

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. Subscribe to ...

From performing intricate surgeries or hitting baseballs that come at us at 100 miles per hour, we humans might think that we have pretty decent vision. But according to a recent study published in ...