Grace's Warbler
Grace's Warbler has surged: up 193% on the route-weighted index since 1970.
About the Grace's Warbler
The Grace's Warbler (Setophaga graciae) 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 74 Breeding Bird Survey routes across 4 states, most concentrated in the Southern Rockies / Colorado Plateau.
- Family
- Parulidae · Forest birds
Notable Grace's Warbler Trends
No notable trend signals for Grace's Warbler. See the full index history below.
Grace's Warbler Population Forecast
If the recent trend holds, Grace's Warbler is projected to rise about 46% by 2029 — from 0.08 in 2024 to a central estimate of 0.12 (95% range 0.08–0.15). A 5-year backtest shows a typical error of ±21.8%, with 100% of held-out values landing inside the 95% band.
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.11 | 0.07 | 0.14 |
| 2026 | 0.11 | 0.07 | 0.14 |
| 2027 | 0.11 | 0.08 | 0.15 |
| 2028 | 0.11 | 0.08 | 0.15 |
| 2029 | 0.12 | 0.08 | 0.15 |
Where the Grace's Warbler Is Detected
BBS routes recording Grace's Warbler, sized by most recent count.
Grace's Warbler Population Trend by State
| Arizona | +65% | 1970 | 23 |
| Colorado | +151% | 1980 | 18 |
| New Mexico | +66% | 1970 | 23 |
| Utah | +40% | 1990 | 10 |
Grace's Warbler Population Trend by Region
Bird Conservation Regions are the ecological unit for trends.
| Southern Rockies / Colorado Plateau | +101% | 1970 | 50 |
| Sierra Madre Occidental | -23% | 1970 | 21 |
| Chihuahuan Desert | +108% | 1980 | 3 |
Grace's Warbler Conservation Status
Our route-weighted index shows it up about 193% 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.