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

Swamp Sparrow Population Trend in Vermont

All statesGeneralists

Swamp Sparrow in Vermont has increased: up 28% on the route-weighted index since 1968.

+28%Since 1968
24Routes In State
58Years

Notable Swamp Sparrow Trends in Vermont

No notable trend signals for Swamp Sparrow in Vermont. See the full index history below.

Swamp Sparrow Population Forecast in Vermont

If the recent trend holds, Swamp Sparrow in Vermont is projected to stay roughly flat through 2029, near 2.1 (95% range 0.78–3.5). A 5-year backtest shows a typical error of ±54.5%, with 100% of held-out values landing inside the 95% band.

+1%Change by 2029
2.1Projected 2029 index
0.78–3.595% range
±54.5%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
20252.10.753.4
20262.10.763.5
20272.10.773.5
20282.10.783.5
20292.10.783.5

Swamp Sparrow Survey Routes in Vermont

Routes recording Swamp Sparrow in Vermont.
Hinesburg1419941977
W Rutland1320241966
Hardwick920241966
Stowe620241989
S Wallingfrd320221966
Marlboro219671967
Landgrove220241970
East Haven220231966
Middlesex220241968
East Calais220241966
Waterville219801979
Grand Isle220231967
North Pownal120241967
Stratton120231966
S Reading120221969
Post Mills120241967
Shaftsbury120241973
St Johnsbury119981973
Northfld Fls120181980
Greensboro120241967
Fletcher120111993
Colchester120221999
Newbury 2120152009
Bristol120181995

Swamp Sparrow Population Trend in Other States

connecticutdelawareillinoisindianaiowamainemarylandmassachusettsmichiganminnesotanebraskanew-hampshirenew-jerseynew-yorknorth-dakotaohiopennsylvaniarhode-islandsouth-dakotavirginiawest-virginiawisconsin

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