Pine Warbler Population Analysis
Pine Warbler has surged: up 160% on the route-weighted index since 1968.
About the Pine Warbler
The Pine Warbler (Setophaga pinus) 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 1,520 Breeding Bird Survey routes across 32 states, most concentrated in the Southeastern Coastal Plain.
- Family
- Parulidae · Forest birds
Notable Pine 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 →
Pine Warbler has surged in surveyed states: up 160% on the route-weighted index since 1968.
Pine Warbler Population Forecast
If the recent trend holds, Pine Warbler is projected to rise about 20% by 2030 — from 2.6 in 2025 to a central estimate of 3.1 (95% range 2.6–3.6). A 5-year backtest shows a typical error of ±7.5%, with 100% of held-out values landing inside the 95% band.
Where the Pine Warbler Is Detected
BBS routes recording Pine Warbler, sized by most recent count.
Pine Warbler Population Trend by State
Pine Warbler Population Trend by Region
Bird Conservation Regions are the ecological unit for trends.
Pine Warbler Conservation Status
Our route-weighted index shows it up about 160% since 1968.
Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. Trend is a route-weighted relative-abundance index, not an absolute population.