SFVAS’s Bird of the Month is the Northern Yellow Warbler!
If you’ve ever spotted a flash of brilliant yellow darting through the willows near a stream, chances are you’ve met the Northern Yellow Warbler.
The males are especially eye-catching with their sunny yellow feathers and rusty red streaks across the chest, while females and juveniles wear a softer, greenish-yellow.
In Southern California, these warblers show up as spring and summer visitors, favoring riparian areas like rivers, streams, or wetlands with willow thickets and cottonwoods. They spend most of their time hunting insects, plucking caterpillars and beetles from leaves with remarkable precision.
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Photo Credit: David Barton
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Photo Credit: David Barton
One particularly fascinating behavior: Yellow Warblers have developed a brilliant strategy against Brown-headed Cowbirds, which try to sneak their eggs into warbler nests. Instead of abandoning ship, the warbler simply builds a new nest floor right over the cowbird’s eggs. They’ve even developed a specific alarm call (a sharp “seet”) to warn other birds when cowbirds are nearby, and other species have learned to listen in.
Whether they’re outsmarting nest parasites or brightening up the local canyon, these little birds are as clever as they are beautiful.
