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

Mallard Population Trend in New Jersey

All statesWaterfowl

Mallard in New Jersey has fallen sharply: down 51% on the route-weighted index since 1968.

-51%Since 1968
36Routes In State
58Years

Notable Mallard Trends in New Jersey

long arc declinecomputed index

Mallard has fallen sharply in New Jersey: down 51% on the route-weighted index since 1968.

Mallard Population Forecast in New Jersey

If the recent trend holds, Mallard in New Jersey is projected to stay roughly flat through 2029, near 1.1 (95% range 0.00–2.9). A 5-year backtest shows a typical error of ±170.4%, with 100% of held-out values landing inside the 95% band.

+8%Change by 2029
1.1Projected 2029 index
0.00–2.995% range
±170.4%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
20251.10.003.0
20261.10.003.0
20271.10.002.9
20281.10.002.9
20291.10.002.9

Mallard Survey Routes in New Jersey

Routes recording Mallard in New Jersey.
Mt Misery3419891976
Woodbury Hgt1220241968
Pedricktown1220121995
Holmansville920091969
Clarksville619801976
Toms River520241966
Hope519931971
Midvale520211971
Ocean City320151979
Villas319791979
Greenwich220231982
Six Points220241990
Albion220071968
Masonville219701966
Croton220031974
Robbinsville219751966
Bloomsbury220231969
Pottersville220111977
Keyport220181990
Friendship220032003
Pomona219921992
Spraguetown219971981
Pedricktown 2220192013
Winslow220071989
Spraguetown 2120032003

Mallard Population Trend in Other States

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

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