Unlike humans and most other mammals, birds can see ultraviolet light. But not all avian eyes are created equal, according to new research. Apparently, birds with smaller eyes are better able to perceive the UV spectrum.
Many animals can see ultraviolet light, including some amphibians, reptiles and fish. Even a few select mammals can see UV light, such as rats, bats and, surprisingly, reindeer. In general, this ability helps animals attract mates, find food and detect predators.