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Species · Massachusetts · BBS 2025 Release · 1966–2024

Northern Mockingbird Population Trend in Massachusetts

All statesGeneralists

Northern Mockingbird in Massachusetts has surged: up 230% on the route-weighted index since 1968.

+230%Since 1968
30Routes In State
58Years

Notable Northern Mockingbird Trends in Massachusetts

long arc increasecomputed index

Northern Mockingbird has surged in Massachusetts: up 230% on the route-weighted index since 1968.

Northern Mockingbird Population Forecast in Massachusetts

If the recent trend holds, Northern Mockingbird in Massachusetts is projected to rise about 72% by 2029 — from 1.1 in 2024 to a central estimate of 1.8 (95% range 0.00–7.1). A 5-year backtest shows a typical error of ±140.5%, with 100% of held-out values landing inside the 95% band.

+72%Change by 2029
1.8Projected 2029 index
0.00–7.195% range
±140.5%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
20252.10.007.4
20262.00.007.3
20272.00.007.3
20281.90.007.2
20291.80.007.1

Northern Mockingbird Survey Routes in Massachusetts

Routes recording Northern Mockingbird in Massachusetts.
E Pepperell1519941971
Pittsfield619921979
Newburyport520221970
Cheshire519941971
Mansfield420241972
Warren420091968
Chilmark319831971
N Oxford320241974
Cape Cod Ns319991989
Gay Head320241996
Prattville220191974
Maynard220221971
Littleton220241974
Princeton219751971
Belchertown220241973
Chesterfield220061978
Ware River219931993
N. Andover220191995
E Dennis120191969
Marion120221970
Wellfleet120051966
Brockton120191967
S Barre120211976
N Orange120001986
Cummington119831981

Northern Mockingbird Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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