Abstract

Dual-speaker experiments conducted with rufous-sided towhees ( Pipilo erythrophthalmus) demonstrated that they do not respond to song of three other species and that the sequence and diversity of phrases within a song, and the time interval between syllables of the note-complex phrase, may be important in species recognition. These results are compared with results of song recognition studies done with species that are extensively sympatric with towhees in eastern North America.

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