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

House Sparrow Population Trend in Maine

All statesGeneralists

House Sparrow in Maine has fallen sharply: down 52% on the route-weighted index since 1968.

-52%Since 1968
55Routes In State
58Years

Notable House Sparrow Trends in Maine

long arc declinecomputed index

House Sparrow has fallen sharply in Maine: down 52% on the route-weighted index since 1968.

House Sparrow Population Forecast in Maine

If the recent trend holds, House Sparrow in Maine is projected to fall about 91% by 2029 — from 8.3 in 2024 to a central estimate of 0.73 (95% range 0.00–7.8). A 5-year backtest shows a typical error of ±106.9%, with 40% of held-out values landing inside the 95% band.

-91%Change by 2029
0.73Projected 2029 index
0.00–7.895% range
±106.9%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
20251.20.008.3
20261.10.008.2
20270.990.008.0
20280.860.007.9
20290.730.007.8

House Sparrow Survey Routes in Maine

Routes recording House Sparrow in Maine.
Kittery Pt5520241966
Westbrook3920241977
Cornville3220242012
Brooks2420181977
Bowdoin Ctr1820211971
Ludlow1719951968
Manchester1219951973
East Troy1020171972
Brownfield1020092009
Rome1020241996
Biddeford920191975
Cooper819811976
Moose River819861983
Harmony720241967
Benton719801971
Carrabassett719861984
Washburn720051979
Otisfield Gr620151966
Grnd Lk Strm619661966
Bethel520161972
Turner520101972
Hermon520181966
Aurora519831983
Cambridge420131967
Ft Fairfield420051993

House Sparrow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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