toadschooled:

This odd little frog is a Thompson’s toothless frog [Genyophryne thomsoni], a common species endemic to Papua New Guinea. As of now it’s believed to be the only member of its genus Genyophryne, but researchers acknowledge that its population may be comprised of several different species waiting to be differentiated. It’s a forest dweller noted for its rusty coloring and flat wide head, likely meant to imitate a leaf. Image by Fieldherpforum.com user Ritt.