Species · Idaho · BBS 2025 Release · 1966–2024
Loggerhead Shrike Population Trend in Idaho
Loggerhead Shrike in Idaho has surged: up 142% on the route-weighted index since 1971.
+142%Since 1971
23Routes In State
53Years
Notable Loggerhead Shrike Trends in Idaho
long arc increasecomputed index
Loggerhead Shrike has surged in Idaho: up 142% on the route-weighted index since 1971.
Loggerhead Shrike Population Forecast in Idaho
If the recent trend holds, Loggerhead Shrike in Idaho is projected to fall about 19% by 2029 — from 0.68 in 2024 to a central estimate of 0.55 (95% range 0.03–1.1). A 5-year backtest shows a typical error of ±103.3%, with 100% of held-out values landing inside the 95% band.
-19%Change by 2029
0.55Projected 2029 index
0.03–1.195% range
±103.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.54 | 0.02 | 1.1 |
| 2026 | 0.54 | 0.02 | 1.1 |
| 2027 | 0.55 | 0.03 | 1.1 |
| 2028 | 0.55 | 0.03 | 1.1 |
| 2029 | 0.55 | 0.03 | 1.1 |
Loggerhead Shrike Survey Routes in Idaho
| Kyle Canyon | 7 | 2024 | 1985 |
| Hot Spring | 5 | 2014 | 1988 |
| Tractor Flat | 4 | 2024 | 1985 |
| Almo | 4 | 2023 | 2015 |
| Twin Buttes | 3 | 2024 | 1985 |
| Picabo | 3 | 2018 | 1988 |
| Craters | 2 | 2017 | 1980 |
| Acequia | 2 | 2007 | 1979 |
| Pasadena Val | 2 | 2007 | 2003 |
| Lost River | 1 | 2024 | 1987 |
| Circular Bu | 1 | 2024 | 1985 |
| Dubois | 1 | 2024 | 1969 |
| Springfield | 1 | 1980 | 1976 |
| Triangle | 1 | 2015 | 1992 |
| Henry | 1 | 1981 | 1981 |
| Joel | 1 | 1992 | 1990 |
| Crane Creek | 1 | 2019 | 1992 |
| Silver City | 1 | 2018 | 1994 |
| Carey | 1 | 2017 | 1990 |
| Mud Lake | 1 | 2004 | 2004 |
| Dougal Res | 1 | 2015 | 1990 |
| Cedar Hill | 1 | 2023 | 1993 |
| Daniels Res | 1 | 2000 | 2000 |
Loggerhead Shrike Population Trend in Other States
alabamaarizonaarkansascaliforniacoloradofloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmichiganminnesotamississippimissourimontananebraskanevadanew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.