Species · Nevada · BBS 2025 Release · 1966–2024
White-faced Ibis Population Trend in Nevada
White-faced Ibis in Nevada has surged: up 30× on the route-weighted index since 1992.
30×Since 1992
15Routes In State
34Years
Notable White-faced Ibis Trends in Nevada
long arc increasecomputed index
White-faced Ibis has surged in Nevada: up 30× on the route-weighted index since 1992.
White-faced Ibis Population Forecast in Nevada
If the recent trend holds, White-faced Ibis in Nevada is projected to fall about 73% by 2029 — from 12 in 2024 to a central estimate of 3.2 (95% range 0.00–87). A 5-year backtest shows a typical error of ±176.7%, with 100% of held-out values landing inside the 95% band.
-73%Change by 2029
3.2Projected 2029 index
0.00–8795% range
±176.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 8.1 | 0.00 | 92 |
| 2026 | 6.9 | 0.00 | 90 |
| 2027 | 5.6 | 0.00 | 89 |
| 2028 | 4.4 | 0.00 | 88 |
| 2029 | 3.2 | 0.00 | 87 |
White-faced Ibis Survey Routes in Nevada
| Ruby Valley 2 | 325 | 2024 | 2004 |
| Fallon | 131 | 2023 | 1992 |
| Hiko | 105 | 2021 | 1998 |
| Carson River | 24 | 2002 | 2001 |
| Cortez | 24 | 2022 | 2018 |
| Ruby Valley | 20 | 2001 | 1997 |
| Chimney Res. | 16 | 2017 | 2016 |
| Piute Mdws | 8 | 2018 | 2018 |
| Majors Place | 8 | 2019 | 1990 |
| Dobbin Creek | 7 | 2018 | 1998 |
| Gardnerville 2 | 7 | 2018 | 2013 |
| Virgin Creek | 3 | 2015 | 2015 |
| Gardnerville | 2 | 2012 | 2004 |
| Bald Mtn. | 1 | 2015 | 2015 |
| Ash Meadows | 1 | 2016 | 2012 |
White-faced Ibis Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.