Guild · Oregon · BBS 2025 Release · 1966–2024
Grassland Birds In Oregon
8 species in this guild. As a group they are -27% since 1970.
Guild Signals
No notable trend signals for grassland birds in Oregon. See the full index history below.
Forecast
If the recent trend holds, Grassland birds in Oregon is projected to fall about 49% by 2029 — from 6.9 in 2024 to a central estimate of 3.5 (95% range 0.00–7.2). A 5-year backtest shows a typical error of ±50.3%, with 60% of held-out values landing inside the 95% band.
-49%Change by 2029
3.5Projected 2029 index
0.00–7.295% range
±50.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 3.9 | 0.14 | 7.7 |
| 2026 | 3.8 | 0.03 | 7.6 |
| 2027 | 3.7 | 0.00 | 7.5 |
| 2028 | 3.6 | 0.00 | 7.3 |
| 2029 | 3.5 | 0.00 | 7.2 |
Member Species In Oregon
| Ring-necked Pheasant | Phasianidae | -59% |
| Western Meadowlark | Icteridae | -37% |
| Grasshopper Sparrow | Passerellidae | -28% |
| Lark Sparrow | Passerellidae | +10% |
| Savannah Sparrow | Passerellidae | +22% |
| Horned Lark | Alaudidae | +35% |
| Bobolink | Icteridae | +47% |
| Vesper Sparrow | Passerellidae | +89% |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.