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

Pine Warbler Population Trend in Connecticut

All statesForest birds

Pine Warbler in Connecticut has surged: up 32× on the route-weighted index since 1980.

32×Since 1980
19Routes In State
43Years

Notable Pine Warbler Trends in Connecticut

long arc increasecomputed index

Pine Warbler has surged in Connecticut: up 32× on the route-weighted index since 1980.

Pine Warbler Population Forecast in Connecticut

If the recent trend holds, Pine Warbler in Connecticut is projected to rise about 17% by 2029 — from 2.9 in 2024 to a central estimate of 3.4 (95% range 2.7–4.1). A 5-year backtest shows a typical error of ±14.7%, with 80% of held-out values landing inside the 95% band.

+17%Change by 2029
3.4Projected 2029 index
2.7–4.195% range
±14.7%Backtest error
19752029
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
20253.12.43.8
20263.22.43.9
20273.22.54.0
20283.32.64.1
20293.42.74.1

Pine Warbler Survey Routes in Connecticut

Routes recording Pine Warbler in Connecticut.
Warren720111978
Uncasville520241990
Woodstock520071983
Willimantic520181975
Warren 2520242012
Granby520241995
Mystic320231987
No Woodbury320211995
New Hartford320241994
Woodstock 2320242016
Buckingham220222010
Sherman220151998
Greenwich220141989
Mid Haddam220241980
Southington220242010
New Hartford219851985
Westbrook120241993
Danbury120142013
Long Hill120192005

Pine Warbler Population Trend in Other States

alabamaarkansasdelawarefloridageorgiaillinoisindianakentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawest-virginiawisconsin

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