Hylodes magalhaesi
There are fewer of this frog than there were in the past. Scientists do not know why for sure. They think it could be that human beings change the places where the frog lives. Humans cut down trees to get wood to build with and to make farms and build cities.  There are also other frogs from other parts of the world that eat the same food as this frog. This frog can be killed by disease: Scientists found the chytridiomycosis fungus growing on some frogs. This fungus can kill frogs.