Species · Idaho · BBS 2025 Release · 1966–2024
White-faced Ibis Population Trend in Idaho
White-faced Ibis in Idaho has surged: up 198% on the route-weighted index since 1973.
+198%Since 1973
10Routes In State
46Years
Notable White-faced Ibis Trends in Idaho
long arc increasecomputed index
White-faced Ibis has surged in Idaho: up 198% on the route-weighted index since 1973.
White-faced Ibis Population Forecast in Idaho
If the recent trend holds, White-faced Ibis in Idaho is projected to rise about 63× by 2029 — from 0.16 in 2024 to a central estimate of 10 (95% range 0.00–23). A 5-year backtest shows a typical error of ±1681.9%, with 100% of held-out values landing inside the 95% band.
63×Change by 2029
10Projected 2029 index
0.00–2395% range
±1681.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 9.6 | 0.00 | 22 |
| 2026 | 9.8 | 0.00 | 22 |
| 2027 | 9.9 | 0.00 | 23 |
| 2028 | 10 | 0.00 | 23 |
| 2029 | 10 | 0.00 | 23 |
White-faced Ibis Survey Routes in Idaho
| Preston | 37 | 2023 | 1988 |
| Cedar Hill | 29 | 2022 | 2002 |
| Pocatello | 25 | 2019 | 1981 |
| Springfield | 12 | 2014 | 1971 |
| Blackft Res | 7 | 2001 | 2001 |
| Picabo | 7 | 2021 | 2021 |
| Mud Lake | 5 | 2023 | 1988 |
| Tractor Flat | 4 | 2024 | 1991 |
| Ririe | 3 | 2022 | 1987 |
| Iron Springs | 1 | 2015 | 2015 |
White-faced Ibis Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.