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Species · Kansas · BBS 2026 Release · 1966–2025

Grasshopper Sparrow Population Trend in Kansas

All statesGrassland birds

Grasshopper Sparrow in Kansas has declined: down 46% on the route-weighted index since 1969.

-46%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 →
66Routes 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 Grasshopper 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 →

No notable trend signals for Grasshopper Sparrow in Kansas. See the full index history below.

Grasshopper Sparrow Population Forecast in Kansas

If the recent trend holds, Grasshopper Sparrow in Kansas is projected to rise about 169% by 2030 — from 5.1 in 2025 to a central estimate of 14 (95% range 1.6–26). A 5-year backtest shows a typical error of ±181.1%, with 60% of held-out values landing inside the 95% band.

+169%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 →
14Projected 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 →
1.6–2695% 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 →
±181.1%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, Grasshopper Sparrow in Kansas is projected to rise about 169% by 2030 — from 5.1 in 2025 to a central estimate of 14 (95% range 1.6–26). A 5-year backtest shows a typical error of ±181.1%, with 60% of held-out values landing inside the 95% band.19672030
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 →
2026142.026
2027141.926
2028141.826
2029141.726
2030141.626

Grasshopper Sparrow Survey Routes in Kansas

Routes recording Grasshopper 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 →
Coldwater5520221969
Grigston3620242000
Chapman3519811967
Ashland3420211969
Thrall3319701967
Coats2620251967
Solomon2620251982
Lincolnville2420242002
Minneapolis2320191967
Susank1720222000
Albert1620251967
Gray1620191967
Lapland1520221974
Wreford1520241967
Berwet1420252000
Leoville1220181967
Beloit 21220182005
Phillipsburg1120251967
Hopewell1120142000
Jewell1020051968
Missler1020191975
Plymell1020252000
Winona1020182000
Damar920162000
St John820191967

Grasshopper Sparrow Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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