What reptile is the most vocal, with some species able to communicate more than 20 distinguishable messages through sound alone? – 2017

What reptile is the most vocal, with some species able to communicate more than 20 distinguishable messages through sound alone?

crocodilians

Captain Hook laments Peter Pan’s role in causing the crocodile to follow him, due to Peter cutting off his hand and throwing it to the crocodile.

crocodilia_collage







Crocodiles
Reptile
The Crocodilia are an order of mostly large, predatory, semiaquatic reptiles. They appeared 83.5 million years ago in the Late Cretaceous period and are the closest living relatives of birds.
Scientific name: Crocodilia
Higher classification: Reptile




Vocalisations are frequent as the juveniles disperse, and again as they congregate in the morning. Nearby adults, presumably the parents, also give signals warning of predators or alerting the youngsters to the presence of food.

The range and quantity of vocalisations vary between species. Alligators are the noisiest, while some crocodile species are almost completely silent. Adult female New Guinea crocodiles and Siamese crocodiles roar when approached by another adult, while Nile crocodiles grunt or bellow in a similar situation.

The American alligator is exceptionally noisy; it emits a series of about seven throaty bellows, each a couple of seconds long, at ten second intervals. It also makes various grunts and hisses.[85] Males create vibrations in the water to send out infrasonic signals that serve to attract females and intimidate rivals.[88] The enlarged boss of the male gharial may serve as a sound resonator.

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