ScienceAmong the new species is one with a bird-poo-like appearance (above) when young that changes as it matures, and another named for its blood-red belly. "It's an unusual frog because generally speaking there's not a lot of water at all in the [karst country] and they seem to be calling from down in things like sinkholes," Dr Richards said. "There are frogs in South America and frogs in Asia that do the same thing