Tegtman, Natalie; Magrath, Robert
In a pioneering study of signal design, Marler (Marler 1955 Nature 176, 6–8.
(doi:10.1038/176006a0); Marler 1957 Behaviour 11, 13–37. (doi:10.1163/
156853956X00066)) argued that the contrasting acoustic design of hawk
(seet) and mobbing alarm calls of European passerines reflected their contrasting function. Hawk alarms were high-frequency tones, warning
conspecifics to flee but making localization difficult for predators, while mobbing calls were broadband and harsh, allowing easy...[Show more]
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