Species · Montana · BBS 2025 Release · 1966–2024
Pygmy Nuthatch Population Trend in Montana
Pygmy Nuthatch in Montana has collapsed: down 78% on the route-weighted index since 1987.
-78%Since 1987
13Routes In State
31Years
Notable Pygmy Nuthatch Trends in Montana
long arc declinecomputed index
Pygmy Nuthatch has collapsed in Montana: down 78% on the route-weighted index since 1987.
Pygmy Nuthatch Population Forecast in Montana
If the recent trend holds, Pygmy Nuthatch in Montana is projected to stay roughly flat through 2029, near 0.03 (95% range 0.00–0.25). A 5-year backtest shows a typical error of ±331.6%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.03Projected 2029 index
0.00–0.2595% range
±331.6%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.04 | 0.00 | 0.26 |
| 2026 | 0.04 | 0.00 | 0.26 |
| 2027 | 0.03 | 0.00 | 0.25 |
| 2028 | 0.03 | 0.00 | 0.25 |
| 2029 | 0.03 | 0.00 | 0.25 |
Pygmy Nuthatch Survey Routes in Montana
| Kalispell | 3 | 2018 | 2010 |
| Pablo Res. | 3 | 2007 | 2007 |
| Skalkaho | 3 | 1997 | 1992 |
| Arlee | 3 | 2013 | 1991 |
| Ninemile | 2 | 2024 | 2004 |
| Reed Point | 2 | 2013 | 2013 |
| Painted Rock | 2 | 1997 | 1992 |
| Libby Dam | 1 | 1990 | 1986 |
| Sula | 1 | 2023 | 2023 |
| Victor | 1 | 2019 | 1994 |
| St Regis | 1 | 1997 | 1986 |
| Woodman | 1 | 1976 | 1976 |
| Clinton | 1 | 2023 | 2022 |
Pygmy Nuthatch Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.