Blackpoll Warbler
Blackpoll Warbler has surged: up 416% on the route-weighted index since 1970.
About the Blackpoll Warbler
The Blackpoll Warbler (Setophaga striata) 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 159 Breeding Bird Survey routes across 7 states, most concentrated in the Atlantic Northern Forest.
- Family
- Parulidae · Forest birds
Notable Blackpoll Warbler Trends
No notable trend signals for Blackpoll Warbler. See the full index history below.
Blackpoll Warbler Population Forecast
If the recent trend holds, Blackpoll Warbler is projected to rise about 137% by 2029 — from 0.06 in 2024 to a central estimate of 0.15 (95% range 0.06–0.23). A 5-year backtest shows a typical error of ±148.9%, with 40% of held-out values landing inside the 95% band.
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.14 | 0.06 | 0.22 |
| 2026 | 0.14 | 0.06 | 0.22 |
| 2027 | 0.14 | 0.06 | 0.23 |
| 2028 | 0.14 | 0.06 | 0.23 |
| 2029 | 0.15 | 0.06 | 0.23 |
Where the Blackpoll Warbler Is Detected
BBS routes recording Blackpoll Warbler, sized by most recent count.
Blackpoll Warbler Population Trend by State
| Alaska | +7% | 1976 | 89 |
| Maine | -83% | 1972 | 32 |
| Massachusetts | insufficient data | n/a | 2 |
| New Hampshire | -70% | 1970 | 11 |
| New York | +66% | 1973 | 13 |
| Pennsylvania | insufficient data | n/a | 1 |
| Vermont | -10% | 1972 | 11 |
Blackpoll Warbler Population Trend by Region
Bird Conservation Regions are the ecological unit for trends.
| BCR 2 | -76% | 1987 | 16 |
| BCR 4 | +57% | 1976 | 60 |
| Northern Pacific Rainforest | -96% | 1985 | 12 |
| Atlantic Northern Forest | -91% | 1970 | 67 |
Blackpoll Warbler Conservation Status
Our route-weighted index shows it up about 416% since 1970.
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. Trend is a route-weighted relative-abundance index, not an absolute population.