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

Common Grackle Population Trend in Massachusetts

All statesGeneralists

Common Grackle in Massachusetts has collapsed: down 75% on the route-weighted index since 1968.

-75%Since 1968
32Routes In State
58Years

Notable Common Grackle Trends in Massachusetts

long arc declinecomputed index

Common Grackle has collapsed in Massachusetts: down 75% on the route-weighted index since 1968.

Common Grackle Population Forecast in Massachusetts

If the recent trend holds, Common Grackle in Massachusetts is projected to fall about 53% by 2029 — from 16 in 2024 to a central estimate of 7.4 (95% range 0.00–22). A 5-year backtest shows a typical error of ±37.4%, with 100% of held-out values landing inside the 95% band.

-53%Change by 2029
7.4Projected 2029 index
0.00–2295% range
±37.4%Backtest error
19662029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
2025100.0024
20269.40.0024
20278.70.0023
20288.00.0022
20297.40.0022

Common Grackle Survey Routes in Massachusetts

Routes recording Common Grackle in Massachusetts.
Chilmark5419831969
Mansfield5220241968
Cheshire4219941969
E Pepperell3719941966
Wellfleet 23020242016
Newburyport2820221967
Warren 22620242010
Wellfleet2520071966
N Oxford2220241968
Cape Cod Ns2220071989
N. Andover2020241995
Prattville1920191966
Marion1820241966
E Dennis1720211967
Brockton1720191967
Chesterfield1620241967
Princeton1519761969
Belchertown1220241967
Cummington920141968
Ware River920221993
N Orange820241968
Holden820241977
Warren720091968
S Barre720241968
Gay Head720241996

Common Grackle Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

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