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Male owls pitch their hoots to advertise body weight to competitors

Male owls respond more strongly to the high-pitched calls that simulate lighter individuals, confirming that territorial males attend to pitch information advertising body weight in the calls of their competitors. The authors also found that the territory owners give slightly lower pitched hoots in response to calls mimicking heavier males, probably indicating that they attempted to sound heavier when challenged by more threatening individuals.

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Keywords: male, owls, pitch, hoots, advertise, body, weight, competitors, owl, hoot, competitor

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