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Parent-Young Vocal Communication in Western Grebes
Gary L. Nuechterlein
Vol. 90, No. 3 (Aug., 1988), pp. 632-636
Published by: Cooper Ornithological Society
Stable URL: http://www.jstor.org/stable/1368352
Page Count: 5
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Field observations indicate that Western Grebe (Aechmophorus occidentalis) parents use two vocalizations, Ticking and Clucking, to affect head movements of newly hatched chicks being carried on their back. Playbacks of Ticking calls result in chicks hiding their heads beneath the back feathers and being silent, while Clucking calls result in chicks poking their heads out and begging loudly for food. Ticking calls heard within a colony are given primarily by parents with chicks, not by individuals without offspring. Observations outside of the colony suggest that it functions as an alarm signal to chicks, and not as a generalized alarm signal to mates or other members of the colony.
The Condor © 1988 Cooper Ornithological Society