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

Field Sparrow Population Trend in Wyoming

All statesGeneralists

Field Sparrow in Wyoming has surged: up 118% on the route-weighted index since 1986.

+118%Since 1986
25Routes In State
34Years

Notable Field Sparrow Trends in Wyoming

long arc increasecomputed index

Field Sparrow has surged in Wyoming: up 118% on the route-weighted index since 1986.

Field Sparrow Population Forecast in Wyoming

If the recent trend holds, Field Sparrow in Wyoming is projected to stay roughly flat through 2029, near 0.11 (95% range 0.00–0.54). A 5-year backtest shows a typical error of ±171.8%, with 100% of held-out values landing inside the 95% band.

+6%Change by 2029
0.11Projected 2029 index
0.00–0.5495% range
±171.8%Backtest error
19802029
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
20250.120.000.55
20260.120.000.55
20270.110.000.54
20280.110.000.54
20290.110.000.54

Field Sparrow Survey Routes in Wyoming

Routes recording Field Sparrow in Wyoming.
Hampshire2619991994
Harland Flat1619901990
Recluse1420221988
Harmony1119871987
Soda Well820242006
Highlight419801980
Clark320072007
Shawnee320052000
Bill220011996
Pathfinder220171993
Otto120071990
Midvale119911991
Brookhurst120152015
Rozet120232023
Seely 2120182018
Arvada120241986
Piney119891980
Seely119901990
Ethete119931991
Riverview119891989
Raven120151992
Warbonnet119991997
Lusk119841984
Rawlins119931993
Cheyenne120051997

Field Sparrow Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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