'Silent' vultures turn out to use a wide range of sounds to communicate

Vultures were long thought to make few and fairly simple sounds. Yet no one had investigated in detail how the birds use sound to communicate. For his master's thesis in Jorg Massen's Vulture Cognition Lab, Connor Proudfoot studied the critically endangered Rüppell's vulture. He and his colleagues found that the birds produce a wide range of complex sounds, which they use in a range of social situations. The findings, published today in PLOS One, could help improve the success of captive breeding programs and shed light on the evolution of communication.

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