BirdAnalyst
Species · Wyoming · BBS 2026 Release · 1966–2025

Common Grackle Population Trend in Wyoming

All statesGeneralists

Common Grackle in Wyoming has declined: down 44% on the route-weighted index since 1970.

-44%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 →
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 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 rise about 41% by 2030 — from 3.6 in 2025 to a central estimate of 5.0 (95% range 0.00–11). A 5-year backtest shows a typical error of ±37.6%, with 100% of held-out values landing inside the 95% band.

+41%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 →
5.0Projected 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 →
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 →
±37.6%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 rise about 41% by 2030 — from 3.6 in 2025 to a central estimate of 5.0 (95% range 0.00–11). A 5-year backtest shows a typical error of ±37.6%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20265.10.0011
20275.10.0011
20285.10.0011
20295.00.0011
20305.00.0011

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
Dayton4220251980
Ethete3620251991
Pine Bluff3020251979
Yoder2920251968
Midvale2520251974
Basin2120251970
Chugwater1820241981
Dwyer1720251992
Seely1320001990
Otto1220251970
Ervay1120091974
Brookhurst920191968
Pathfinder920221983
Nowood819951988
Bill820181996
Arvada820251982
Upton820251988
Rawlins 2820162016
Patrick Draw719741973
Tensleep720251995
Recluse720251981
Mayoworth720241982
Sand Draw720251993
Kaycee720252024

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 2026-08-14.