PRBO Conservation Science
Quarterly Journal of PRBO Conservation Science, Number 137, Summer 2004: 2004 Notes from the Field




  

Yellow Warbler (Dendroica petechia)

Bird Bio

--Sarah Warnock, PRBO Education Director


 
Lasting Legacy
Sonoran Desert Saga
Central Valley Wetland Life
Bering Sea Bonanza
Urban Least Terns
Eastern Sierra Education
Bird Bio
Measuring Ocean-Climate Change
Focus on Fall Migration
Estate Gift to PRBO
 


© Peter LaTourrette (www.birdphotography.com)
Characteristics: Bright yellow head and underparts; back and wings olive yellow. Males have rusty streaks from chest to flanks. Dark eye is set off in bright yellow face. Plumage varies regionally: northwestern variants are grayer, desert forms are lighter, and eastern forms brighter.

Distribution: Winters in forests from Mexico to South America. In spring they return to breed throughout the U.S. and Canada, to the arctic treeline, preferring riparian habitats along the coast and forests inland.

Feeding: Thin, pointed bill is perfectly suited to gleaning small insects from beneath leaves.

Song: Song is a variable but usually recognizable form of "sweet-sweet, I'm-so-sweet."

Behavior: Yellow Warblers defend against cowbird egg parasitism by building a second (or third--or sixth!) nest on top of the first, covering both the cowbird's and their own eggs. Nevertheless, cowbird parasitism has caused severe declines in populations in California's Central Valley.

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