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

Common Grackle Population Trend in Wyoming

All statesGeneralists

Common Grackle in Wyoming has declined: down 45% on the route-weighted index since 1970.

-45%Since 1970TrendPercent 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 →
99Routes 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 →
56YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Common Grackle Trends in WyomingNotable 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 Wyoming. See the full index history below.

Common Grackle Population Forecast in Wyoming

If the recent trend holds, Common Grackle in Wyoming is projected to fall about 19% by 2029 — from 6.4 in 2024 to a central estimate of 5.2 (95% range 0.00–11). A 5-year backtest shows a typical error of ±48.3%, with 100% of held-out values landing inside the 95% band.

-19%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 →
5.2Projected 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 →
0.00–1195% 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 →
±48.3%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, Common Grackle in Wyoming is projected to fall about 19% by 2029 — from 6.4 in 2024 to a central estimate of 5.2 (95% range 0.00–11). A 5-year backtest shows a typical error of ±48.3%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20255.30.0011
20265.30.0011
20275.20.0011
20285.20.0011
20295.20.0011

Common Grackle Survey Routes in Wyoming

Routes recording Common Grackle in Wyoming.
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 →
Lingle26020241981
Yoder3520241968
Pine Bluff2620241979
Cody2420241988
Seely 22220242001
Otto2020241970
Midvale2020241974
Basin1920241970
Dwyer1820191992
Chugwater1820241981
Meeteetse1620241991
Newcastle1520241988
Seely1320001990
Ervay1120091974
Worland1120241992
Fletcher Pk1020241984
Brookhurst920191968
Recluse920241981
Pathfinder920221983
Nowood819951988
Bill820181996
Dayton820241980
Arvada820241982
Rawlins 2820162016
Patrick Draw719741973

Common Grackle Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsin

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