Species · Utah · BBS 2025 Release · 1966–2024
Dusky Flycatcher Population Trend in Utah
Dusky Flycatcher in Utah has surged: up 139% on the route-weighted index since 1979.
+139%Since 1979
53Routes In State
46Years
Notable Dusky Flycatcher Trends in Utah
long arc increasecomputed index
Dusky Flycatcher has surged in Utah: up 139% on the route-weighted index since 1979.
Dusky Flycatcher Population Forecast in Utah
If the recent trend holds, Dusky Flycatcher in Utah is projected to rise about 27% by 2029 — from 1.0 in 2024 to a central estimate of 1.3 (95% range 0.79–1.9). A 5-year backtest shows a typical error of ±44.1%, with 60% of held-out values landing inside the 95% band.
+27%Change by 2029
1.3Projected 2029 index
0.79–1.995% range
±44.1%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 1.3 | 0.72 | 1.8 |
| 2026 | 1.3 | 0.74 | 1.8 |
| 2027 | 1.3 | 0.76 | 1.8 |
| 2028 | 1.3 | 0.77 | 1.8 |
| 2029 | 1.3 | 0.79 | 1.9 |
Dusky Flycatcher Survey Routes in Utah
| Lost Cr. Res | 12 | 2018 | 1995 |
| La Sal | 12 | 2000 | 1994 |
| Beck | 10 | 1987 | 1986 |
| Moon Lake 2 | 9 | 2023 | 2004 |
| Grizzly Rdge | 8 | 2024 | 1993 |
| Woodruff | 8 | 2024 | 2007 |
| Fish Lake Nf | 8 | 2024 | 1992 |
| Saleratus Cr | 6 | 2013 | 1995 |
| E. Bear Lake | 6 | 2022 | 2004 |
| Ant Flat-Ogden Can | 6 | 2023 | 1995 |
| Uintah Nf | 6 | 1994 | 1991 |
| Wasatch Nf | 6 | 2024 | 1991 |
| Neponset Res | 5 | 2002 | 1996 |
| Oak City | 5 | 2015 | 1984 |
| Navajo Lake | 5 | 2024 | 1986 |
| Randolph | 5 | 2024 | 1992 |
| Gooseberry | 5 | 2024 | 1994 |
| Goose Creek Mtn. | 5 | 2021 | 2019 |
| Beck 2 | 5 | 2018 | 1990 |
| Altonah | 4 | 2000 | 2000 |
| Hanna | 4 | 2023 | 1997 |
| Hyrum | 3 | 1979 | 1975 |
| La Sal 2 | 3 | 2006 | 2003 |
| Soapstone | 3 | 2024 | 1992 |
| M Warner Res | 3 | 2023 | 2006 |
Dusky Flycatcher Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.