Northern Glassfrog - It sports excellent green camouflage for hiding in the rainforest of Central and South America. The most interesting thing abot these amphibians is that their bellys are transparent. If you look at the frogs underside you can see its lungs, intestines, and its beating heart.
Glass frog (Hyalinobatrachium sp.) found in South and Central America, the skin is so transparent that you can see the organs; with nocturnal habits, they are difficult to observe because of their small size and coloration. Photo credit: Virginia L.Shuford Freire