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1 March 2017 Yellow-Rumped Warblers Use Two Song Categories: Each Male Tends To Use A Unique Song In Each Category In Southern Oregon
Stewart W Janes, Lee Ryker, Robert M Ryan
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Abstract

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 low-light 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.

Stewart W Janes, Lee Ryker, and Robert M Ryan "Yellow-Rumped Warblers Use Two Song Categories: Each Male Tends To Use A Unique Song In Each Category In Southern Oregon," Northwestern Naturalist 98(1), 1-7, (1 March 2017). https://doi.org/10.1898/NWN16-03.1
Received: 5 January 2016; Accepted: 1 July 2016; Published: 1 March 2017
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