Rana holtzi

Rana holtzi, also known as the Taurus frog, is a frog species of the Ranidae family endemic to Turkey, varying in size from 6.0 to 7.5cm. It is the only extant frog species that doesn't croak. Although it was only thought to be present in Karagöl and Çiniligöl, research conducted in 2007 revealed Eğrigöl as another habitat where the species is present.