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

Herring Gull Population Trend in Vermont

All statesWetland birds

Herring Gull in Vermont has edged down: down 14% on the route-weighted index since 1969.

-14%Since 1969
5Routes In State
31Years

Notable Herring Gull Trends in Vermont

No notable trend signals for Herring Gull in Vermont. See the full index history below.

Herring Gull Population Forecast in Vermont

If the recent trend holds, Herring Gull in Vermont is projected to rise about 398% by 2029 — from 0.06 in 2024 to a central estimate of 0.28 (95% range 0.00–1.8). A 5-year backtest shows a typical error of ±317.8%, with 60% of held-out values landing inside the 95% band.

+398%Change by 2029
0.28Projected 2029 index
0.00–1.895% range
±317.8%Backtest error
19672029
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
20250.310.001.8
20260.300.001.8
20270.300.001.8
20280.290.001.8
20290.280.001.8

Herring Gull Survey Routes in Vermont

Routes recording Herring Gull in Vermont.
Post Mills219981969
East Calais119691968
Hinesburg119881986
Colchester119861986
Grand Isle120241967

Herring Gull Population Trend in Other States

alabamaalaskacaliforniacoloradoconnecticutdelawarefloridaidahoillinoisindianakansaslouisianamainemarylandmassachusettsmichiganminnesotamontananew-hampshirenew-jerseynew-yorknorth-carolinaohiooregonpennsylvaniarhode-islandsouth-carolinatexasvirginiawashingtonwest-virginiawisconsin

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