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What Does the Koala Say? BBC News reports on the extraordinarily low pitched calls of the Koala (video). The koala's call is "20 times lower than would be expected for an animal of its size", according to the lead researcher. "[It is] more typical of an animal the size of an elephant." (Or a drunk person.) The deep bellowing is now being attributed to the recently discovered "extra pair of vocal folds" outside the koala's larynx. These folds are "over three times longer and around 700 times heavier than the laryngeal vocal folds".

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