BirdAnalyst
Species · Utah · BBS 2025 Release · 1966–2024

Fox Sparrow Population Trend in Utah

All statesGeneralists

Fox Sparrow in Utah has fallen sharply: down 53% on the route-weighted index since 1979.

-53%Since 1979
21Routes In State
40Years

Notable Fox Sparrow Trends in Utah

long arc declinecomputed index

Fox Sparrow has fallen sharply in Utah: down 53% on the route-weighted index since 1979.

Fox Sparrow Population Forecast in Utah

If the recent trend holds, Fox Sparrow in Utah is projected to fall about 41% by 2029 — from 0.42 in 2024 to a central estimate of 0.25 (95% range 0.00–0.66). A 5-year backtest shows a typical error of ±60.3%, with 100% of held-out values landing inside the 95% band.

-41%Change by 2029
0.25Projected 2029 index
0.00–0.6695% range
±60.3%Backtest error
19752029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.260.000.67
20260.260.000.67
20270.260.000.66
20280.250.000.66
20290.250.000.66

Fox Sparrow Survey Routes in Utah

Routes recording Fox Sparrow in Utah.
Uintah Nf1319941990
Woodruff820242005
Lost Cr. Res720151995
Gooseberry720242013
Logan Canyon520192000
Soapstone420241992
Hardware Ranch420231994
Heber Mtn.320241996
Skyline Driv220061986
Moon Lake 2120232006
Hyrum119791975
Saleratus Cr120111997
Beaver119821979
Randolph120241997
Beck 2120061996
Hanna120231997
Ferron120212000
Ant Flat-Ogden Can120231995
Wasatch Nf120242001
Fish Lake Nf120242024
Main Canyon119931993

Fox Sparrow Population Trend in Other States

alaskacaliforniacoloradoidahomainemontananevadaoregonwashingtonwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.