BirdAnalyst
Species · New Hampshire · BBS 2025 Release · 1966–2024

Carolina Wren Population Trend in New Hampshire

All statesForest birds

Carolina Wren in New Hampshire has surged: up 20× on the route-weighted index since 2003.

20×Since 2003
13Routes In State
21Years

Notable Carolina Wren Trends in New Hampshire

long arc increasecomputed index

Carolina Wren has surged in New Hampshire: up 20× on the route-weighted index since 2003.

Carolina Wren Population Forecast in New Hampshire

If the recent trend holds, Carolina Wren in New Hampshire is projected to fall about 42% by 2029 — from 1.8 in 2024 to a central estimate of 1.0 (95% range 0.27–1.8). A 5-year backtest shows a typical error of ±66.8%, with 20% of held-out values landing inside the 95% band.

-42%Change by 2029
1.0Projected 2029 index
0.27–1.895% range
±66.8%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
20250.870.111.6
20260.910.151.7
20270.950.191.7
20280.990.231.7
20291.00.271.8

Carolina Wren Survey Routes in New Hampshire

Routes recording Carolina Wren in New Hampshire.
East Kingston1120242011
Dover720242003
Strafford620242015
Fitzwilliam520242009
Peterborough420242013
Epsom420232008
Concord420242006
Canterbury220222022
Hopkinton120242022
Gilmantn I W120212021
Walpole120222021
Marlow120241992
Milan119921992

Carolina Wren Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawest-virginiawisconsin

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