No, it's not a bird! The name mountain chicken comes from the frog's large size and the fact that it's hunted for food. Considered one of the world's largest frogs, it reaches lengths of eight inches and weighs up to two pounds. It once lived on a least five major Caribbean islands. As a result of over-hunting, habitat loss and the introduction of alien predators, it's now confined to Dominica and Montserrat.