Cassowary mystery cracked: Nature gifts giant bird an inbuilt ‘airconditioner’

The cassowary makes a guttural rumble which is among the lowest frequency call of any bird.Since Western naturalists first encountered the cassowary, the elusive but deadly bird has been shrouded in mysteries. Chief among them: the purpose of the cassowary’s large, rudder-like crest, known as a “casque”.

Now a team of Melbourne-based scientists say they have cracked the case open – and their answer could also apply to a suite of dinosaurs with similar cranial structures.

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