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

Field Sparrow Population Trend in Pennsylvania

All statesGeneralists

Field Sparrow in Pennsylvania has fallen sharply: down 62% on the route-weighted index since 1968.

-62%Since 1968
136Routes In State
58Years

Notable Field Sparrow Trends in Pennsylvania

long arc declinecomputed index

Field Sparrow has fallen sharply in Pennsylvania: down 62% on the route-weighted index since 1968.

Field Sparrow Population Forecast in Pennsylvania

If the recent trend holds, Field Sparrow in Pennsylvania is projected to fall about 41% by 2029 — from 4.8 in 2024 to a central estimate of 2.8 (95% range 0.80–4.8). A 5-year backtest shows a typical error of ±26.4%, with 100% of held-out values landing inside the 95% band.

-41%Change by 2029
2.8Projected 2029 index
0.80–4.895% range
±26.4%Backtest error
19662029
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
20253.41.45.4
20263.31.25.3
20273.11.15.1
20283.00.945.0
20292.80.804.8

Field Sparrow Survey Routes in Pennsylvania

Routes recording Field Sparrow in Pennsylvania.
Needmore2619911966
Doubling Gap2219771966
Aspers2119891968
Duvall1920211974
Rector1719771966
Sardis1619741967
Labott1619831966
Drehersville 21620242000
Peru Mills1520241966
Stoneybreak1520241992
Millville1420241969
Pine Gr Mill1420241967
Berwick1420241985
Ryde1320051968
Warrens Mill1320241971
Austinville1220241966
Betula1120221973
Mifflintown1120241966
Drehersville1119991966
Jefferson1120241966
Wakena1020231969
Geeseytown1020241987
Jeannette1020231979
Shelocta920241968
Big Flat919811966

Field Sparrow Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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