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

Grasshopper Sparrow Population Trend in Nebraska

All statesGrassland birds

Grasshopper Sparrow in Nebraska has increased: up 29% on the route-weighted index since 1969.

+29%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 →
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 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 36% by 2030 — from 17 in 2025 to a central estimate of 24 (95% range 13–34). A 5-year backtest shows a typical error of ±35.4%, with 100% of held-out values landing inside the 95% band.

+36%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 →
24Projected 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 →
13–3495% 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 →
±35.4%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 36% by 2030 — from 17 in 2025 to a central estimate of 24 (95% range 13–34). A 5-year backtest shows a typical error of ±35.4%, with 100% 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 →
2026231333
2027231333
2028231334
2029241334
2030241334

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
Ringgold8920251985
Sutherland6520252023
Almeria6420211969
Swan Lake6320251969
Arthur5920251985
Marsland5720212018
Oglala Nat. Grass.4720251999
Eagle Creek4620251967
Sparta4520251967
Chambers4520252023
Piester Lake4120251967
Berwyn4120101993
Crescent Lk3920251980
Crookston3720252018
Agate 23520252002
Agate3420011967
Culbertson3320252018
Nenzel3120252018
Brady2920251980
Bartley2820251967
Murray Lake2820251987
Brownlee2820251990
Bassett2720252018
Berwyn 22720252014

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 2026-08-14.