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      Sound familiar? Acoustic similarity provokes responses to unfamiliar heterospecific alarm calls

      , ,
      Behavioral Ecology
      Oxford University Press (OUP)

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          Monkey responses to three different alarm calls: evidence of predator classification and semantic communication

          Vervet monkeys give different alarm calls to different predators. Recordings of the alarms played back when predators were absent caused the monkeys to run into trees for leopard alarms, look up for eagle alarms, and look down for snake alarms. Adults call primarily to leopards, martial eagles, and pythons, but infants give leopard alarms to various mammals, eagle alarms to many birds, and snake alarms to various snakelike objects. Predator classification improves with age and experience.
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            Allometry of alarm calls: black-capped chickadees encode information about predator size.

            Many animals produce alarm signals when they detect a potential predator, but we still know little about the information contained in these signals. Using presentations of 15 species of live predators, we show that acoustic features of the mobbing calls of black-capped chickadees (Poecile atricapilla) vary with the size of the predator. Companion playback experiments revealed that chickadees detect this information and that the intensity of mobbing behavior is related to the size and threat of the potential predator. This study demonstrates an unsuspected level of complexity and sophistication in avian alarm calls.
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              Characteristics of Some Animal Calls

              P Marler (1955)
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                Author and article information

                Journal
                Behavioral Ecology
                Oxford University Press (OUP)
                1465-7279
                1045-2249
                March 01 2011
                March 01 2011
                : 22
                : 2
                : 401-410
                Article
                10.1093/beheco/arq221
                a6e7bc0c-dcc2-445d-92a0-72b136ee34e5
                © 2011
                History

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