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

House Sparrow Population Trend in Ohio

All statesGeneralists

House Sparrow in Ohio has collapsed: down 77% on the route-weighted index since 1968.

-77%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 →
58YearsYears 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 77% 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 2029 — from 45 in 2024 to a central estimate of 0.00 (95% range 0.00–44). A 5-year backtest shows a typical error of ±88.7%, with 20% of held-out values landing inside the 95% band.

-100%Change by 2029TrendPercent 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 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–4495% 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 →
±88.7%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 2029 — from 45 in 2024 to a central estimate of 0.00 (95% range 0.00–44). A 5-year backtest shows a typical error of ±88.7%, with 20% of held-out values landing inside the 95% band.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 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 →
20258.70.0053
20265.40.0050
20272.10.0046
20280.000.0044
20290.000.0044

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
Lockport18220241966
Newport18019941966
Marion 216620242024
New Dover14920221966
Darrtown14620211966
Marion12520231966
Hiram11120211992
Ashley10620181988
Herner Crns9820241966
Maysville9720121992
Kalida9420191966
Westerville9419851966
Peru8919781966
Kunkle8320241992
Xenia8120181966
Vickery8020241996
Strongsville7919951966
Napoleon7420241966
Bloomville6920241992

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 2026-05-22.