Species · BCR 19 · BBS 2025 Release · 1966–2024
White-faced Ibis In Central Mixed Grass Prairie
White-faced Ibis in Central Mixed Grass Prairie has surged: up 134% on the route-weighted index since 1976.
+134%Since 1976
11Routes In Region
35Years
Notable Signals
long arc increasecomputed index
White-faced Ibis has surged in Central Mixed Grass Prairie: up 134% on the route-weighted index since 1976.
Forecast
If the recent trend holds, White-faced Ibis in Central Mixed Grass Prairie is projected to stay roughly flat through 2029, near 0.42 (95% range 0.00–1.0). A 5-year backtest shows a typical error of ±600.6%, with 80% of held-out values landing inside the 95% band.
n/aChange by 2029
0.42Projected 2029 index
0.00–1.095% range
±600.6%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.40 | 0.00 | 1.0 |
| 2026 | 0.41 | 0.00 | 1.0 |
| 2027 | 0.41 | 0.00 | 1.0 |
| 2028 | 0.42 | 0.00 | 1.0 |
| 2029 | 0.42 | 0.00 | 1.0 |
Routes In Central Mixed Grass Prairie
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.