Looks like a frog. Swims like a frog. But doesn’t croak. A flattened, brown, aquatic species from Borneo has just become the only frog shown to have no lungs.
The species, Barbourula kalimantanensis, is so rare that until last year only two specimens were known to science and no herpetologist had seen it alive, says David Bickford of the National University of Singapore.