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Species · Oklahoma · BBS 2025 Release · 1966–2024

Grasshopper Sparrow Population Trend in Oklahoma

All statesGrassland birds

Grasshopper Sparrow in Oklahoma has surged: up 333% on the route-weighted index since 1969.

+333%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 →
64Routes 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 OklahomaNotable 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 increasecomputed 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 →

Grasshopper Sparrow has surged in Oklahoma: up 333% on the route-weighted index since 1969.

Grasshopper Sparrow Population Forecast in Oklahoma

If the recent trend holds, Grasshopper Sparrow in Oklahoma is projected to stay roughly flat through 2029, near 12 (95% range 8.2–15). A 5-year backtest shows a typical error of ±10.8%, with 100% of held-out values landing inside the 95% band.

-5%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 →
12Projected 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 →
8.2–1595% 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 →
±10.8%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 Oklahoma is projected to stay roughly flat through 2029, near 12 (95% range 8.2–15). A 5-year backtest shows a typical error of ±10.8%, 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 →
2025117.614
2026117.815
2027117.915
2028118.115
2029128.215

Grasshopper Sparrow Survey Routes in Oklahoma

Routes recording Grasshopper Sparrow in Oklahoma.
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 →
Clear Lake9020241994
Hooker7620241992
Hardesty5620241970
Sickles2720211994
Tegarden2620161967
Cooperton2620241992
Beaver2520181979
Keyes2520241992
Douglas2220221967
Arapaho1420141992
Phroso1220241991
Matoy1120001992
Cashion1120241992
Reed1020191972
Hunter920241992
Colony819951995
Foraker820241992
Wichita Mts West820222004
Barnsdall719761967
Jet720241992
Woodward720241992
Ft Sill East719941994
Grimes620241968
Bartlesville620241967
Lookout620241967

Grasshopper Sparrow Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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