Q. You once wrote that blue pigment is not known to exist in any terrestrial or freshwater animals with backbones. I found a blue bullfrog in a marsh in Virginia. It was mostly blue with some gray ...

In a remote part of Australia, researchers recently stumbled upon an unusual, blue-skinned tree frog. This individual is a rare genetic mutant of the magnificent tree frog, a large amphibian that’s ...

Think of nature and we think of color: a red sunset, a green forest, a blue ocean. Such scenes, simply described and instantly imaginable, are actually made up of a myriad of hues, tints, and ...

Animals with blue eyes are a rare occurrence in nature due to being linked to recessive genetics, mutations, and specific genes. Despite that, many species still have beautifully rich blue eyes. While ...