Species · Wyoming · BBS 2025 Release · 1966–2024
Williamson's Sapsucker Population Trend in Wyoming
Williamson's Sapsucker in Wyoming has fallen sharply: down 52% on the route-weighted index since 1987.
-52%Since 1987
12Routes In State
36Years
Notable Williamson's Sapsucker Trends in Wyoming
long arc declinecomputed index
Williamson's Sapsucker has fallen sharply in Wyoming: down 52% on the route-weighted index since 1987.
Williamson's Sapsucker Population Forecast in Wyoming
If the recent trend holds, Williamson's Sapsucker in Wyoming is projected to stay roughly flat through 2029, near 0.03 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±46.8%, with 80% of held-out values landing inside the 95% band.
n/aChange by 2029
0.03Projected 2029 index
0.00–0.0895% range
±46.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.03 | 0.00 | 0.08 |
| 2026 | 0.03 | 0.00 | 0.08 |
| 2027 | 0.03 | 0.00 | 0.08 |
| 2028 | 0.03 | 0.00 | 0.08 |
| 2029 | 0.03 | 0.00 | 0.08 |
Williamson's Sapsucker Survey Routes in Wyoming
| Horse Creek | 2 | 2024 | 1984 |
| Mammoth | 2 | 2016 | 1986 |
| Hunter Peak | 1 | 2009 | 1988 |
| Ne Entrance | 1 | 2019 | 1998 |
| Moose | 1 | 1999 | 1999 |
| Yellowstone | 1 | 1992 | 1992 |
| Dubois | 1 | 2021 | 1993 |
| Ryan Park | 1 | 2022 | 2012 |
| Fiddler Lk | 1 | 2018 | 2018 |
| Wilson | 1 | 2016 | 2016 |
| Colter Bay 2 | 1 | 2021 | 2021 |
| Fletcher Pk | 1 | 2009 | 2009 |
Williamson's Sapsucker Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.