A prairie dog's alarm call can describe a predator's size, shape and colour

Biologist Con Slobodchikoff spent decades recording and analyzing prairie dog alarm calls and found they aren't just generic 'danger' signals. The calls encode specific details about an approaching predator, including its size, shape, speed and even the colour of a human's shirt, giving prairie dogs one of the most descriptive alarm systems documented in any non-human animal.

— Con Slobodchikoff, Chasing Doctor Dolittle: Learning the Language of Animals — 2012
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