Birds see a more colorful world than we do, especially when it comes to their eggs, a new study suggests. Subscribe to read this story ad-free Get unlimited access to ad-free articles and exclusive ...

image: 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 led by Princeton's ...

Population-level differences in (left) emittance coefficients and (right) MIR reflectance spectra in bobwhites. Bobwhites from Iowa and Florida, and Florida and Mexico, did not differ in their ...