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

Grasshopper Sparrow Population Trend in Mississippi

All statesGrassland birds

Grasshopper Sparrow in Mississippi has collapsed: down 96% on the route-weighted index since 1972.

-96%Since 1972TrendPercent 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 →
8Routes 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 →
25YearsYears 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 MississippiNotable 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 →

Grasshopper Sparrow has collapsed in Mississippi: down 96% on the route-weighted index since 1972.

Grasshopper Sparrow Population Forecast in Mississippi

If the recent trend holds, Grasshopper Sparrow in Mississippi is projected to fall about 100% by 2009 — from 0.06 in 2004 to a central estimate of 0.00 (95% range 0.00–0.62). A 5-year backtest shows a typical error of ±598.9%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2009TrendPercent 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 2009 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.6295% 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 →
±598.9%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 Mississippi is projected to fall about 100% by 2009 — from 0.06 in 2004 to a central estimate of 0.00 (95% range 0.00–0.62). A 5-year backtest shows a typical error of ±598.9%, with 100% of held-out values landing inside the 95% band.19702009
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 →
20050.000.000.62
20060.000.000.62
20070.000.000.62
20080.000.000.62
20090.000.000.62

Grasshopper Sparrow Survey Routes in Mississippi

Routes recording Grasshopper Sparrow in Mississippi.
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 →
Aberdeen219931970
Lake Mary119901990
Dundee120041970
Tippo119981998
Lucien119951990
Corinth119751974
Tupelo119861978
Macon119961994

Grasshopper Sparrow Population Trend in Other States

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

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