Species · Montana · BBS 2025 Release · 1966–2024
Rock Wren Population Trend in Montana
Rock Wren in Montana has edged up: up 15% on the route-weighted index since 1970.
+15%Since 1970
74Routes In State
56Years
Notable Rock Wren Trends in Montana
No notable trend signals for Rock Wren in Montana. See the full index history below.
Rock Wren Population Forecast in Montana
If the recent trend holds, Rock Wren in Montana is projected to stay roughly flat through 2029, near 0.94 (95% range 0.00–1.9). A 5-year backtest shows a typical error of ±52.4%, with 100% of held-out values landing inside the 95% band.
+5%Change by 2029
0.94Projected 2029 index
0.00–1.995% range
±52.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.97 | 0.03 | 1.9 |
| 2026 | 0.96 | 0.02 | 1.9 |
| 2027 | 0.95 | 0.01 | 1.9 |
| 2028 | 0.95 | 0.00 | 1.9 |
| 2029 | 0.94 | 0.00 | 1.9 |
Rock Wren Survey Routes in Montana
| Glen | 18 | 2024 | 1977 |
| Jordan | 18 | 2023 | 1968 |
| Brunzell Slough | 15 | 2024 | 2015 |
| Ingomar | 8 | 2016 | 1970 |
| Muddy Creek | 8 | 2015 | 2015 |
| Willow Creek | 7 | 1981 | 1972 |
| Boulder | 6 | 2024 | 1969 |
| Miles City | 6 | 2023 | 2015 |
| Wheat Basin | 6 | 2024 | 2017 |
| Bull Mtn. | 5 | 2021 | 1997 |
| Cleveland | 4 | 2023 | 1984 |
| Brusett | 4 | 2024 | 1982 |
| Reed Point | 4 | 2024 | 1977 |
| Red Rock | 4 | 2023 | 1989 |
| Custer 2 | 4 | 2024 | 2024 |
| Custer | 4 | 2022 | 2022 |
| Willow Creek 2 | 3 | 2024 | 1982 |
| Brandenberg | 3 | 2019 | 1972 |
| Jordan South | 3 | 2017 | 2016 |
| Freeman Creek | 3 | 2016 | 2015 |
| Flatwillow 2 | 2 | 2023 | 2014 |
| Pryor Mtn. | 2 | 2024 | 2001 |
| Arlee | 2 | 2012 | 2012 |
| Augusta | 2 | 2015 | 1977 |
| Laurel | 2 | 2022 | 1975 |
Rock Wren Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.