Birds
Pine Warbler
Setophaga pinus · also called pine warblers
A plain olive-yellow bird lands at a backyard feeder in the middle of winter, taking sunflower seeds in a way almost no other warbler would bother to do, a habit that lets the pine warbler stick around long after its strictly insect-eating relatives have already flown south.
Overview
The pine warbler, Setophaga pinus, is a plainly patterned songbird native to pine and mixed pine-hardwood forest habitat across the eastern United States. Its unusual willingness to eat seeds, close association with pine forest specifically, and shorter, sometimes entirely absent migration make it one of the more dietarily flexible and cold-tolerant warblers in North America.
A warbler that never fully needed the tropics
While nearly every other warbler depends entirely on insects and must follow them south each winter, the pine warbler’s willingness to eat seeds has let it stay closer to home, sometimes not migrating at all.
Status
Least Concern — widespread and stable across suitable pine forest habitat throughout the eastern United States.
Pine Warbler: common questions
Why does the pine warbler visit bird feeders when other warblers don't?
This species is one of the few warblers that regularly eats seeds in addition to insects, an unusual dietary flexibility among warblers, which are typically strict insectivores, and this seed-eating habit lets the pine warbler visit backyard feeders during winter when most of its insect-dependent relatives have already migrated to the tropics.
Why does the pine warbler stay north for winter while other warblers migrate south?
This species migrates a shorter distance than many other warblers, and some southeastern populations remain resident year-round rather than travelling to the tropics, a pattern made possible by its ability to supplement its diet with seeds and berries when insects become scarce during colder months.
How can you identify a pine warbler?
Look for a fairly plain olive-yellow bird without the bold facial patterns or wing markings found on many more brightly marked warbler species, generally found methodically foraging along pine trunks, branches, and needle clusters rather than broadleaf foliage.
What does the pine warbler's song sound like?
The male produces a simple, musical trill structurally similar to the songs of several sparrow species, typically delivered from high in the pine canopy, a song style that can require careful attention to distinguish from other trilling birds sharing the same pine forest habitat.