The small, golden amphibian left a lasting impression—literally. As they handled the frog, its bright yellow pigment rubbed off onto their skin, leaving their fingers stained with the same hue ...

Normally, the yellows and blues combine to make green, but it is thought the new blue frog has a mutation that means it is missing the yellow pigments and the blue dominates. “Blue is probably a ...

webbed orange feet and bright blue-and-yellow flanks. This technique, called startle coloration, may give a bird or snake pause, offering a precious instant for the frog to spring to safety.

Red-eyed tree frogs have bright green bodies, white bellies and throats, blue sides with white borders, and bright red or orange feet ...