BirdAnalyst
Species · Ohio · BBS 2026 Release · 1966–2025

House Sparrow Population Trend in Ohio

All statesGeneralists

House Sparrow in Ohio has collapsed: down 79% on the route-weighted index since 1968.

-79%Since 1968TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
88Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
59YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable House Sparrow Trends in OhioNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

House Sparrow has collapsed in Ohio: down 79% on the route-weighted index since 1968.

House Sparrow Population Forecast in Ohio

If the recent trend holds, House Sparrow in Ohio is projected to fall about 100% by 2030 — from 46 in 2025 to a central estimate of 0.00 (95% range 0.00–45). A 5-year backtest shows a typical error of ±91.9%, with 40% of held-out values landing inside the 95% band.

-100%Change by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.00Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–4595% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±91.9%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, House Sparrow in Ohio is projected to fall about 100% by 2030 — from 46 in 2025 to a central estimate of 0.00 (95% range 0.00–45). A 5-year backtest shows a typical error of ±91.9%, with 40% of held-out values landing inside the 95% band.19662030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20268.00.0053
20274.70.0050
20281.50.0046
20290.000.0045
20300.000.0045

House Sparrow Survey Routes in Ohio

Routes recording House Sparrow in Ohio.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Dunlap42019881966
Wilmington40319961966
Bismark33919951967
Graytown29919841966
Tecumseh26819821966
N Baltimore18420191966
Newport18019941966
Marion 216620252024
New Dover14920221966
Darrtown14620211966
Kalida13920251966
Marion12520231966
Ashley10620181988
Herner Crns10020251966
Lockport9720251966
Maysville9720121992
Westerville9419851966
Vickery9120251996
Peru8919781966
No Kenton8920251966
Lucerne8420251992
Xenia8120181966
Strongsville7919951966
Fulton7820251966
Smithfield7520251966

House Sparrow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaoklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.