BirdAnalyst
Species · BCR 17 · BBS 2025 Release · 1966–2024

Common Grackle In Badlands and Prairies

All regionsBadlands and PrairiesGeneralists

Common Grackle in Badlands and Prairies has surged: up 95% on the route-weighted index since 1969.

+95%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 →
133Routes 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 →
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 SignalsNotable 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 →

Common Grackle has surged in Badlands and Prairies: up 95% on the route-weighted index since 1969.

Common Grackle In Badlands and Prairies Population Forecast

If the recent trend holds, Common Grackle in Badlands and Prairies is projected to stay roughly flat through 2029, near 13 (95% range 7.6–18). A 5-year backtest shows a typical error of ±9.4%, with 100% of held-out values landing inside the 95% band.

-2%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 →
13Projected 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 →
7.6–1895% 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 →
±9.4%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, Common Grackle in Badlands and Prairies is projected to stay roughly flat through 2029, near 13 (95% range 7.6–18). A 5-year backtest shows a typical error of ±9.4%, 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 →
2025127.318
2026127.418
2027137.418
2028137.518
2029137.618

Routes In Badlands and Prairies

Routes recording Common Grackle 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 →
IsabelSOUTH-DAKOTA1812015
Cedar PassSOUTH-DAKOTA1802023
Eagle ButteSOUTH-DAKOTA1582015
ChamberlainSOUTH-DAKOTA1302011
BowmanNORTH-DAKOTA1222024
Ft ThompsonSOUTH-DAKOTA1202011
PromiseSOUTH-DAKOTA1012015
VolunteerSOUTH-DAKOTA1012019
RockyfordSOUTH-DAKOTA952023
ZapNORTH-DAKOTA832024
DickinsonNORTH-DAKOTA732024
SolenNORTH-DAKOTA612024
CrookstonNEBRASKA522024
RosebudSOUTH-DAKOTA482011
LacreekSOUTH-DAKOTA432023
CarsonNORTH-DAKOTA412024
OwankaSOUTH-DAKOTA392022
Dunn CenterNORTH-DAKOTA382024
GorhamNORTH-DAKOTA372018
WinnerSOUTH-DAKOTA362024
Cedar CreekNORTH-DAKOTA322022
Glen UllinNORTH-DAKOTA312022
Custer 2MONTANA282024
MaurineSOUTH-DAKOTA282024
LodgepoleSOUTH-DAKOTA272024

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