Yellow Warbler
Yellow Warbler has increased: up 26% on the route-weighted index since 1968.
About the Yellow Warbler
A bright, sweet-singing warbler of willows, wet thickets and streamsides, the Yellow Warbler is one of the most widespread wood-warblers in North America.
- Size
- 4.5–5 in long, about 0.4 oz (12–13 cm, 10 g)
- Habitat
- Woodlands and forest edges, including wooded suburbs and parks.
- Diet
- Insects and caterpillars gleaned from foliage.
- Range
- Recorded on 3,005 Breeding Bird Survey routes across 48 states, most concentrated in the Appalachian Mountains.
- Family
- Parulidae · Forest birds
- Conservation
- Least Concern
Notable Yellow Warbler TrendsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →
No notable trend signals for Yellow Warbler. See the full index history below.
Yellow Warbler Population Forecast
If the recent trend holds, Yellow Warbler is projected to stay roughly flat through 2029, near 4.1 (95% range 3.3–4.9). A 5-year backtest shows a typical error of ±11.1%, with 100% of held-out values landing inside the 95% band.
Where the Yellow Warbler Is Detected
BBS routes recording Yellow Warbler, sized by most recent count.
Yellow Warbler Population Trend by State
Yellow Warbler Population Trend by Region
Bird Conservation Regions are the ecological unit for trends.
Yellow Warbler Conservation Status
Least Concern
The IUCN Red List rates this species as Least Concern. Our route-weighted index shows it up about 26% since 1968.
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. Trend is a route-weighted relative-abundance index, not an absolute population.