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

Common Grackle Population Trend in Maryland

All statesGeneralists

Common Grackle in Maryland has collapsed: down 77% on the route-weighted index since 1968.

-77%Since 1968
76Routes In State
58Years

Notable Common Grackle Trends in Maryland

long arc declinecomputed index

Common Grackle has collapsed in Maryland: down 77% on the route-weighted index since 1968.

Common Grackle Population Forecast in Maryland

If the recent trend holds, Common Grackle in Maryland is projected to fall about 43% by 2029 — from 45 in 2024 to a central estimate of 26 (95% range 0.00–52). A 5-year backtest shows a typical error of ±8.6%, with 100% of held-out values landing inside the 95% band.

-43%Change by 2029
26Projected 2029 index
0.00–5295% range
±8.6%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
2025347.761
2026325.659
2027303.456
2028281.354
2029260.0052

Common Grackle Survey Routes in Maryland

Routes recording Common Grackle in Maryland.
Harmony26420171966
Matthews25720241966
Williamsport24220241966
Fruitland18119981966
Sinepuxent16019781966
Cokesbury14920241966
Tall Timbers14520141966
Snow Hill14219761966
Melitota11120241966
Broomes Isl10419961966
Piney Neck10020241966
Grove Neck10019961992
Vienna8420241966
Newark7920241966
Emmitsburg7520241966
Bald Friar7519961992
Millington7220241966
Fair Hill7219961992
Easton7020211966
Cheltenham6720041966
Pt Republic6519891966
Forest Grove5820232011
Largo5519811966
Pr Frederick5420241991
Jennings5320241995

Common Grackle Population Trend in Other States

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

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