Grunt work: unique vocal folds give koalas their low-pitched voice

The secret to koalas\’ distinctive low-pitched vocalisations has been found, according to a new study published today in the journal Current Biology.

Male koalas produce a bellow of a very low pitch, much lower than would be expected from an animal of their size, and more typical of an animal the size of an elephant.

But, unlike any other land-dwelling mammal, the Australian marsupial has been found to have an extra pair of laryngeal vocal folds.

via Grunt work: unique vocal folds give koalas their low-pitched voice.

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