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ABSTRACT. The vocalizations of Siberian chipmunks recorded under natural conditions were studied. Variation of time-and-frequency structure was described. The structure of studied Siberian chipmunks calls was different from the structure of American chipmunks calls, so as from the calls of specimens from introduced population of Siberian chipmunk in Freiburg (Germany).
KEY WORDS: Siberian chipmunk, Tamias sibiricus, vocalization.
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