Cassowary Sound What Sound does A Cassowary Make?
The cassowary, the endangered dinosaur bird of the Australian rain forests, produces the lowest sounding bird call in the world. It can reach a frequency as low as 32 hertz. Humans can hear sounds between 20 and 20,000 hertz so the cassowaries call is just above our hearing range.
The first indications you may get of the presence of a cassowary is a deep low-frequency rumbling and booming sound that permeates the forest and can last for several minutes. It makes these sounds in its chest and neck by resonating air and then amplifying the sound further with its casque.
Scientists think that cassowaries communicate with one and other using this low frequency vocalisations which can travel great distances through the thick forest foliage.