Blue-winged Warbler
Blue-winged Warbler has declined: down 46% on the route-weighted index since 1968.
About the Blue-winged Warbler
The Blue-winged Warbler (Vermivora cyanoptera) is a North American member of the Wood-Warblers (Parulidae). In this analysis it is grouped with the forest birds.
- Size
- 4.5–5.5 in long (11–14 cm) — a small, active songbird (typical for the family)
- Habitat
- Woodlands and forest edges, including wooded suburbs and parks.
- Diet
- Insects and spiders gleaned from foliage and bark, with seeds and berries in season.
- Range
- Recorded on 789 Breeding Bird Survey routes across 28 states, most concentrated in the Appalachian Mountains.
- Family
- Parulidae · Forest birds
Notable Blue-winged 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 Blue-winged Warbler. See the full index history below.
Blue-winged Warbler Population Forecast
If the recent trend holds, Blue-winged Warbler is projected to stay roughly flat through 2029, near 0.11 (95% range 0.02–0.21). A 5-year backtest shows a typical error of ±18.8%, with 100% of held-out values landing inside the 95% band.
Where the Blue-winged Warbler Is Detected
BBS routes recording Blue-winged Warbler, sized by most recent count.
Blue-winged Warbler Population Trend by State
Blue-winged Warbler Population Trend by Region
Bird Conservation Regions are the ecological unit for trends.
Blue-winged Warbler Conservation Status
Our route-weighted index shows it down about 46% 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.