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

House Sparrow Population Trend in Kansas

All statesGeneralists

House Sparrow in Kansas has collapsed: down 82% on the route-weighted index since 1969.

-82%Since 1969TrendPercent 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 →
67Routes 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 →
57YearsYears 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 KansasNotable 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 Kansas: down 82% on the route-weighted index since 1969.

House Sparrow Population Forecast in Kansas

If the recent trend holds, House Sparrow in Kansas is projected to fall about 100% by 2029 — from 21 in 2024 to a central estimate of 0.00 (95% range 0.00–27). A 5-year backtest shows a typical error of ±145.2%, 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 →
0.00–2795% 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 →
±145.2%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 Kansas is projected to fall about 100% by 2029 — from 21 in 2024 to a central estimate of 0.00 (95% range 0.00–27). A 5-year backtest shows a typical error of ±145.2%, with 20% of held-out values landing inside the 95% band.19672029
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 →
20250.000.0027
20260.000.0027
20270.000.0027
20280.000.0027
20290.000.0027

House Sparrow Survey Routes in Kansas

Routes recording House Sparrow in Kansas.
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 →
Chapman13219811967
Plymell12120242000
Gray10620191967
Wellington6820241968
Coats5020191967
Berwet5020242000
Covert4420241967
Lakin4320221967
Seneca3320221967
Dalton3020241968
Wreford3020241967
Hays2920141967
Rexford2920242000
Bucyrus2720242022
Olathe2620211967
Ulysses2620242000
Kanopolis2420241967
Ruleton2420221981
Melrose2220231967
Missler2020191975
Grantville1920221967
Humboldt1820221968
Beloit 21720182005
Winona1620172000
Hollenberg1520231969

House Sparrow Population Trend in Other States

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

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