DAMN that is one tiny-ass frog! But the press release from Conservation.org says it’s the smallest Old World frog, which implies that there is a New World frog even smaller.
This is the Mount Iberia Eleuth or Brazilian Gold Frog, and it is generally recognized as the smallest frog in the world, but if that little frog is really an adult specimen, as the press release says, then I think we have a new champion.


