Scientists Discover Unique Voice Organ in Koalas

An international team of biologists led by Dr Benjamin D. Charlton from the University of Sussex has discovered that koalas (Phascolarctos cinereus) possess a unique sound-producing organ that has never before been seen in any other land-dwelling mammal.

During the breeding season, male koalas produce low-pitched mating calls that are characterized by a continuous series of inhalation and exhalation sections, and an extremely low fundamental frequency. The pitch of these calls is about twenty times lower than it should be, given the koala’s relatively small size.

Source: Here