BirdAnalyst
Species · BCR 17 · BBS 2026 Release · 1966–2025

Grasshopper Sparrow In Badlands and Prairies

All regionsBadlands and PrairiesGrassland birds

Grasshopper Sparrow in Badlands and Prairies has edged down: down 22% on the route-weighted index since 1969.

-22%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 →
129Routes In RegionSurvey 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 SignalsNotable 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 Badlands and Prairies. See the full index history below.

Grasshopper Sparrow In Badlands and Prairies Population Forecast

If the recent trend holds, Grasshopper Sparrow in Badlands and Prairies is projected to stay roughly flat through 2030, near 17 (95% range 5.9–28). A 5-year backtest shows a typical error of ±21.3%, with 100% of held-out values landing inside the 95% band.

-6%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 →
17Projected 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 →
5.9–2895% 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 →
±21.3%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 Badlands and Prairies is projected to stay roughly flat through 2030, near 17 (95% range 5.9–28). A 5-year backtest shows a typical error of ±21.3%, 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 →
2026165.727
2027175.727
2028175.827
2029175.827
2030175.928

Routes In Badlands and Prairies

Routes recording Grasshopper Sparrow in Badlands and Prairies.
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 →
PioneerSOUTH-DAKOTA1082024
GorhamNORTH-DAKOTA932025
CircleMONTANA772023
Coleman CouleeMONTANA702024
RosebudSOUTH-DAKOTA662011
Cedar CreekNORTH-DAKOTA652022
HardingSOUTH-DAKOTA652025
Dinosaurs H.M.MONTANA632025
Jordan SouthMONTANA612025
S. PioneerSOUTH-DAKOTA602024
RevaSOUTH-DAKOTA592025
VolunteerSOUTH-DAKOTA532025
WinnettMONTANA472025
Oglala Nat. Grass.NEBRASKA472025
Ft YatesNORTH-DAKOTA472004
CarsonNORTH-DAKOTA462025
White RiverSOUTH-DAKOTA442014
MarcusSOUTH-DAKOTA422015
LaplantSOUTH-DAKOTA402015
LocateMONTANA382025
AlbionMONTANA382025
Flatwillow 2MONTANA372023
Miles CityMONTANA372025
CrookstonNEBRASKA372025
GolvaNORTH-DAKOTA342025

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