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

Carolina Wren Population Trend in Maine

All statesForest birds

Carolina Wren in Maine has surged: up 15× on the route-weighted index since 2000.

15×Since 2000
9Routes In State
21Years

Notable Carolina Wren Trends in Maine

long arc increasecomputed index

Carolina Wren has surged in Maine: up 15× on the route-weighted index since 2000.

Carolina Wren Population Forecast in Maine

If the recent trend holds, Carolina Wren in Maine is projected to stay roughly flat through 2029, near 0.36 (95% range 0.05–0.67). A 5-year backtest shows a typical error of ±63.3%, with 20% of held-out values landing inside the 95% band.

-2%Change by 2029
0.36Projected 2029 index
0.05–0.6795% range
±63.3%Backtest error
19922029
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
20250.310.000.62
20260.330.020.64
20270.340.030.65
20280.350.040.66
20290.360.050.67

Carolina Wren Survey Routes in Maine

Routes recording Carolina Wren in Maine.
Cape Neddick620232005
Kittery Pt620241992
Northfield 2220142014
Carrabassett120172017
Westbrook120241992
Otisfield Gr120122012
Hartford120142014
Bowdoin Ctr120132013
Freedom120212021

Carolina Wren Population Trend in Other States

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

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