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

Marsh Wren Population Trend in Vermont

All statesForest birds

Marsh Wren in Vermont has declined: down 43% on the route-weighted index since 1970.

-43%Since 1970
8Routes In State
48Years

Notable Marsh Wren Trends in Vermont

No notable trend signals for Marsh Wren in Vermont. See the full index history below.

Marsh Wren Population Forecast in Vermont

If the recent trend holds, Marsh Wren in Vermont is projected to rise about 216% by 2029 — from 0.11 in 2024 to a central estimate of 0.35 (95% range 0.00–0.86). A 5-year backtest shows a typical error of ±558.2%, with 100% of held-out values landing inside the 95% band.

+216%Change by 2029
0.35Projected 2029 index
0.00–0.8695% range
±558.2%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
20250.350.000.87
20260.350.000.87
20270.350.000.86
20280.350.000.86
20290.350.000.86

Marsh Wren Survey Routes in Vermont

Routes recording Marsh Wren in Vermont.
Hinesburg819941977
Bristol320001995
S Wallingfrd220221973
W Rutland220241979
Landgrove120172017
Post Mills120182018
Colchester120082008
Grand Isle119921967

Marsh Wren Population Trend in Other States

alabamaarizonacaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaslouisianamainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatexasutahvirginiawashingtonwisconsinwyoming

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