BirdAnalyst
Species · New Jersey · BBS 2025 Release · 1966–2024

Northern Mockingbird Population Trend in New Jersey

All statesGeneralists

Northern Mockingbird in New Jersey has fallen sharply: down 70% on the route-weighted index since 1968.

-70%Since 1968
43Routes In State
58Years

Notable Northern Mockingbird Trends in New Jersey

long arc declinecomputed index

Northern Mockingbird has fallen sharply in New Jersey: down 70% on the route-weighted index since 1968.

Northern Mockingbird Population Forecast in New Jersey

If the recent trend holds, Northern Mockingbird in New Jersey is projected to fall about 46% by 2029 — from 9.4 in 2024 to a central estimate of 5.1 (95% range 0.35–9.9). A 5-year backtest shows a typical error of ±19.5%, with 100% of held-out values landing inside the 95% band.

-46%Change by 2029
5.1Projected 2029 index
0.35–9.995% range
±19.5%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
20256.31.511
20266.01.211
20275.70.9510
20285.40.6510
20295.10.359.9

Northern Mockingbird Survey Routes in New Jersey

Routes recording Northern Mockingbird in New Jersey.
Pedricktown 24620242013
Pedricktown4320121991
Deepwater4219771969
Masonville3919701966
Cape May Ch3720131992
Robbinsville3119791966
Woodbury Hgt2420241967
Holmansville2320091969
Cranbury2220241987
Villas2219811979
Ancora2019771966
Bennett Mill 21720242016
Mt Misery1619891976
Clarksville1419911969
Croton 21320242008
Bennett Mill1220001966
Six Points1120241978
Roosevelt1120221986
Del Haven1119911991
Albion1020221966
Keyport1020221986
Winslow1020241989
New Bedford920241969
Croton920071970
Greenwich820241966

Northern Mockingbird Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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