Researchers from the University of Copenhagen say the frogs, found across the rainforests of Madagascar, emit whistling sounds while communicating with others of their species. “That is why we ...

The new species are named after seven of the sci ... [Related: Humans can’t hear these frogs screaming.] ...

Small leaf litter frogs were arching their backs, throwing back their heads and opening their mouths wide. They looked like they were screaming but the scientists could hear nothing. When they ...

Many species of frogs are sexually dimorphic — adult females are often significantly larger than males. "There’s a very good opportunity that females can exploit their male counterparts ...