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

Green Heron Population Trend in New Jersey

All statesWetland birds

Green Heron in New Jersey has fallen sharply: down 57% on the route-weighted index since 1968.

-57%Since 1968
39Routes In State
58Years

Notable Green Heron Trends in New Jersey

long arc declinecomputed index

Green Heron has fallen sharply in New Jersey: down 57% on the route-weighted index since 1968.

Green Heron Population Forecast in New Jersey

If the recent trend holds, Green Heron in New Jersey is projected to fall about 63% by 2029 — from 0.24 in 2024 to a central estimate of 0.09 (95% range 0.00–0.51). A 5-year backtest shows a typical error of ±31.9%, with 100% of held-out values landing inside the 95% band.

-63%Change by 2029
0.09Projected 2029 index
0.00–0.5195% range
±31.9%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
20250.140.000.55
20260.120.000.54
20270.110.000.53
20280.100.000.52
20290.090.000.51

Green Heron Survey Routes in New Jersey

Routes recording Green Heron in New Jersey.
Bennett Mill619761967
Deepwater519771969
Spraguetown519831980
Del Haven319911991
Kemah Lake320241967
Six Points220151978
Robbinsville219791979
Midvale220061967
Villas219801979
Croton 2220162016
Woodbury Hgt120091968
Greenwich120211966
Toms River120091967
Albion120111968
Ancora119761972
Sandbrook120001969
Holmansville119961969
Clarksville119841972
New Bedford120241973
Croton119991973
Hope119941970
Bloomsbury120131976
High Point120211978
Dover120221977
Pottersville120131983

Green Heron Population Trend in Other States

alabamaarizonaarkansascaliforniaconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanevadanew-hampshirenew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawashingtonwest-virginiawisconsin

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