Species · Idaho · BBS 2025 Release · 1966–2024
Common Poorwill Population Trend in Idaho
Common Poorwill in Idaho has collapsed: down 79% on the route-weighted index since 1987.
-79%Since 1987
13Routes In State
32Years
Notable Common Poorwill Trends in Idaho
long arc declinecomputed index
Common Poorwill has collapsed in Idaho: down 79% on the route-weighted index since 1987.
Common Poorwill Population Forecast in Idaho
If the recent trend holds, Common Poorwill in Idaho is projected to stay roughly flat through 2024, near 0.04 (95% range 0.00–0.12). A 5-year backtest shows a typical error of ±112.6%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2024
0.04Projected 2024 index
0.00–0.1295% range
±112.6%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2020 | 0.04 | 0.00 | 0.13 |
| 2021 | 0.04 | 0.00 | 0.13 |
| 2022 | 0.04 | 0.00 | 0.12 |
| 2023 | 0.04 | 0.00 | 0.12 |
| 2024 | 0.04 | 0.00 | 0.12 |
Common Poorwill Survey Routes in Idaho
| Twin Buttes | 4 | 2001 | 1985 |
| Lost River | 4 | 1995 | 1995 |
| Almo | 3 | 2000 | 1997 |
| Daniels Res | 1 | 2000 | 1992 |
| Kyle Canyon | 1 | 1998 | 1998 |
| Circular Bu | 1 | 2004 | 1995 |
| Picabo | 1 | 2018 | 2013 |
| Crane Creek | 1 | 2019 | 2005 |
| Craters | 1 | 2017 | 2003 |
| Springfield | 1 | 1977 | 1977 |
| Triangle | 1 | 2013 | 1992 |
| Magic Mtn | 1 | 1992 | 1991 |
| Pocatello | 1 | 2014 | 1987 |
Common Poorwill Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.