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Thursday, August 24, 2017

Bleats and trills evolved multiple times to aid in 'caller ID'

http://ift.tt/eA8V8J Sheep, giant pandas, mouse lemurs, and fur seals all have something in common when it comes to communication. All of them produce calls with rapid, vibrato-like fundamental frequency modulation -- commonly known as bleats or trills. Now, researchers think they know why that call feature has arisen multiple times over the course of evolution: it improves the ability of listeners to detect call components that provide important identifying information about a caller.

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