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Species · Nebraska · BBS 2025 Release · 1966–2024

Grasshopper Sparrow Population Trend in Nebraska

All statesGrassland birds

Grasshopper Sparrow in Nebraska has edged up: up 24% on the route-weighted index since 1969.

+24%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 →
76Routes 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 Grasshopper Sparrow Trends in NebraskaNotable 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 Nebraska. See the full index history below.

Grasshopper Sparrow Population Forecast in Nebraska

If the recent trend holds, Grasshopper Sparrow in Nebraska is projected to rise about 43% by 2029 — from 17 in 2024 to a central estimate of 24 (95% range 14–34). A 5-year backtest shows a typical error of ±36.3%, with 100% of held-out values landing inside the 95% band.

+43%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 →
24Projected 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 →
14–3495% 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 →
±36.3%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 Nebraska is projected to rise about 43% by 2029 — from 17 in 2024 to a central estimate of 24 (95% range 14–34). A 5-year backtest shows a typical error of ±36.3%, with 100% 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 →
2025231333
2026231333
2027231334
2028241334
2029241434

Grasshopper Sparrow Survey Routes in Nebraska

Routes recording Grasshopper Sparrow in Nebraska.
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 →
Mullen15320231990
Ringgold8420241985
Eagle Creek7120241967
Sutherland6620242023
Almeria6420211969
Crookston6020242018
Arthur5820241985
Marsland5720212018
Brownlee4720241990
Swan Lake4320231969
Sparta4120211967
Berwyn4120101993
Piester Lake3920241967
Nenzel3820242018
Bassett3520242018
Agate3420011967
Gordon3120241975
Chambers3120232023
Maxwell3020242018
Culbertson2920242018
Wheeler Co2720241978
Oglala Nat. Grass.2720231999
Bartley2320241967
Midway2320231967
Liberty2220031967

Grasshopper Sparrow Population Trend in Other States

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

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