BirdAnalyst
Species · BCR 11 · BBS 2025 Release · 1966–2024

Common Grackle In Prairie Potholes

All regionsPrairie PotholesGeneralists

Common Grackle in Prairie Potholes has edged down: down 16% on the route-weighted index since 1969.

-16%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 →
124Routes 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 →

No notable trend signals for Common Grackle in Prairie Potholes. See the full index history below.

Common Grackle In Prairie Potholes Population Forecast

If the recent trend holds, Common Grackle in Prairie Potholes is projected to stay roughly flat through 2029, near 68 (95% range 46–90). A 5-year backtest shows a typical error of ±3.8%, with 100% of held-out values landing inside the 95% band.

-1%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 →
68Projected 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 →
46–9095% 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 →
±3.8%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, Common Grackle in Prairie Potholes is projected to stay roughly flat through 2029, near 68 (95% range 46–90). A 5-year backtest shows a typical error of ±3.8%, 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 →
2025694691
2026684690
2027684690
2028684690
2029684690

Routes In Prairie Potholes

Routes recording Common Grackle in Prairie Potholes.
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 →
CondeSOUTH-DAKOTA3921984
Douglas CrkNORTH-DAKOTA3222024
RoswellSOUTH-DAKOTA3002014
EdgeleyNORTH-DAKOTA2992024
WimbledonNORTH-DAKOTA2712024
Winside 2NEBRASKA2642022
Horsehead LkNORTH-DAKOTA2432024
MontpelierNORTH-DAKOTA1942024
BraddockNORTH-DAKOTA1662022
BuchananNORTH-DAKOTA1542024
Sheyenne LkNORTH-DAKOTA1542024
Danzig 2NORTH-DAKOTA1412024
SpartaNEBRASKA1392021
HartlandMINNESOTA1362017
WebsterNORTH-DAKOTA1352024
CooperstownNORTH-DAKOTA1272024
DenbighNORTH-DAKOTA1272024
TurtonSOUTH-DAKOTA1252024
NilesNORTH-DAKOTA1202024
MaynardMINNESOTA1162015
Lakota 2NORTH-DAKOTA1162024
GettysburgSOUTH-DAKOTA1152023
MccallsburgIOWA1132024
Lane 2SOUTH-DAKOTA1092014
KanawhaIOWA1052024

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