Species · Wyoming · BBS 2025 Release · 1966–2024
American Dipper Population Trend in Wyoming
American Dipper in Wyoming has fallen sharply: down 62% on the route-weighted index since 1980.
-62%Since 1980
12Routes In State
41Years
Notable American Dipper Trends in Wyoming
long arc declinecomputed index
American Dipper has fallen sharply in Wyoming: down 62% on the route-weighted index since 1980.
American Dipper Population Forecast in Wyoming
If the recent trend holds, American Dipper in Wyoming is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.06). A 5-year backtest shows a typical error of ±48.4%, with 80% of held-out values landing inside the 95% band.
n/aChange by 2029
0.02Projected 2029 index
0.00–0.0695% range
±48.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.02 | 0.00 | 0.07 |
| 2026 | 0.02 | 0.00 | 0.06 |
| 2027 | 0.02 | 0.00 | 0.06 |
| 2028 | 0.02 | 0.00 | 0.06 |
| 2029 | 0.02 | 0.00 | 0.06 |
American Dipper Survey Routes in Wyoming
| Yellowstone | 2 | 2012 | 1988 |
| Mammoth | 2 | 2023 | 1983 |
| Ne Entrance | 1 | 2015 | 1993 |
| Moose | 1 | 2019 | 1976 |
| Soda Lake | 1 | 1980 | 1980 |
| Buckskin Mtn | 1 | 2021 | 1981 |
| Bald Mtn | 1 | 2023 | 2022 |
| Fox Park | 1 | 2001 | 2001 |
| Alpine | 1 | 2024 | 1980 |
| Wilson | 1 | 1997 | 1979 |
| Horse Creek | 1 | 2005 | 1996 |
| Green River | 1 | 1981 | 1979 |
American Dipper Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.