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THE SINGING BEHAVIOUR OF YELLOW WARBLERS by DAVID A. SPECTOR1) (Department of Zoology, Morrill Science Center, University of Massachusetts, Amherst, Massachusetts 01003, U.S.A.) (With 8 Figures) (Acc. 19-XI-1990) Introduction Although many songbirds either have only one song or seem to use the many songs in their repertoires as functionally equivalent signals, other species use different songs in different situations (SMITH, 1959; BAPTISTA, 1978; SMITH Et al., 1978; PAYNE, 1979; COSENS & FALLS, 1984). Such species provide a special opportunity to study the use of song and to associate particular patterns of use with structural attributes (such as size, complexity, or patterns of amplitude and frequency distribution) of song repertoires. Among the songbirds that use different songs in different contexts, the wood-warblers (Parulinae) in hermivora, Parula, Dendroica, Mniotilta, and Setophaga are particularly interesting as a relatively large group among which patterns of song use are shared by related species. Males of these species have one or more songs that are used during a dawn song bout and that are also used during territorial encounters, and another song or group of songs that is used primarily during daylight and that is used more by unmated than by mated males (LEIN,
Behaviour – Brill
Published: Jan 1, 1991
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