Species · BCR 19 · BBS 2025 Release · 1966–2024
Sora In Central Mixed Grass Prairie
Sora in Central Mixed Grass Prairie has declined: down 45% on the route-weighted index since 1990.
-45%Since 1990
11Routes In Region
21Years
Notable Signals
No notable trend signals for Sora in Central Mixed Grass Prairie. See the full index history below.
Forecast
If the recent trend holds, Sora in Central Mixed Grass Prairie is projected to rise about 65% by 2029 — from 0.06 in 2024 to a central estimate of 0.10 (95% range 0.00–0.32). A 5-year backtest shows a typical error of ±72.8%, with 60% of held-out values landing inside the 95% band.
+65%Change by 2029
0.10Projected 2029 index
0.00–0.3295% range
±72.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.09 | 0.00 | 0.31 |
| 2026 | 0.09 | 0.00 | 0.31 |
| 2027 | 0.10 | 0.00 | 0.31 |
| 2028 | 0.10 | 0.00 | 0.31 |
| 2029 | 0.10 | 0.00 | 0.32 |
Routes In Central Mixed Grass Prairie
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.