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

Green Heron Population Trend in Vermont

All statesWetland birds

Green Heron in Vermont has fallen sharply: down 72% on the route-weighted index since 1970.

-72%Since 1970
20Routes In State
45Years

Notable Green Heron Trends in Vermont

long arc declinecomputed index

Green Heron has fallen sharply in Vermont: down 72% on the route-weighted index since 1970.

Green Heron Population Forecast in Vermont

If the recent trend holds, Green Heron in Vermont is projected to stay roughly flat through 2028, near 0.05 (95% range 0.00–0.23). A 5-year backtest shows a typical error of ±47%, with 100% of held-out values landing inside the 95% band.

-4%Change by 2028
0.05Projected 2028 index
0.00–0.2395% range
±47%Backtest error
19662028
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
20240.070.000.24
20250.060.000.23
20260.060.000.23
20270.060.000.23
20280.050.000.23

Green Heron Survey Routes in Vermont

Routes recording Green Heron in Vermont.
W Rutland220151972
Hinesburg219941971
North Pownal120211981
Landgrove119831970
S Reading119981966
Gaysville119961966
Post Mills120231983
Shaftsbury119751975
S Wallingfrd120101967
St Johnsbury119951972
East Haven119951971
Middlesex119851985
Hardwick119891970
Greensboro120071972
Fletcher120191971
Waterville119701967
Colchester120211987
Grand Isle120161973
Stowe119891989
Bristol119981998

Green Heron Population Trend in Other States

alabamaarizonaarkansascaliforniaconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvirginiawashingtonwest-virginiawisconsin

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