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首页> 外文期刊>Northwestern Naturalist: a journal of vertebrate biology >YELLOW-RUMPED WARBLERS USE TWO SONG CATEGORIES: EACH MALE TENDS TO USE A UNIQUE SONG IN EACH CATEGORY IN SOUTHERN OREGON
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YELLOW-RUMPED WARBLERS USE TWO SONG CATEGORIES: EACH MALE TENDS TO USE A UNIQUE SONG IN EACH CATEGORY IN SOUTHERN OREGON

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We describe the singing behavior of Yellow-rumped Warblers (Setophaga coronata) in southern Oregon. Males used songs of 2 categories. Type I songs were delivered early in the breeding season before females were observed, and differed from the Type II songs delivered in lowlight conditions before sunrise after the arrival of females. Both Type I and Type II songs were used after the dawn chorus. Chip-like call notes did not accompany Type II singing in the dawn chorus unlike some warblers with 2 song categories. Both Type I and Type II songs varied considerably among males, and song sharing was uncommon. Songs of Yellow-rumped Warblers were performance encoded; no obvious features with respect to frequency, duration, or syllable structure united the songs within each song category. Unlike many warblers with performance-encoded songs, Type II song bouts of a given male consisted of a single variant.

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