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

Carolina Wren Population Trend in Delaware

All statesForest birds

Carolina Wren in Delaware has surged: up 13× on the route-weighted index since 1968.

13×Since 1968
17Routes In State
58Years

Notable Carolina Wren Trends in Delaware

long arc increasecomputed index

Carolina Wren has surged in Delaware: up 13× on the route-weighted index since 1968.

Carolina Wren Population Forecast in Delaware

If the recent trend holds, Carolina Wren in Delaware is projected to fall about 30% by 2029 — from 54 in 2024 to a central estimate of 38 (95% range 23–53). A 5-year backtest shows a typical error of ±40.7%, with 20% of held-out values landing inside the 95% band.

-30%Change by 2029
38Projected 2029 index
23–5395% range
±40.7%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
2025352051
2026362151
2027372152
2028372252
2029382353

Carolina Wren Survey Routes in Delaware

Routes recording Carolina Wren in Delaware.
Harrington8220241966
Pepperbox 27720242017
Holleyville 24720242006
Pepperbox4420161998
Milton 24320172017
Holleyville4120041966
Millsboro4120242017
Georgetown3320221992
Milton3120161966
Blackbird2520241994
Frankford2320121966
Lowes Xrds1819911966
Wilmington720141968
Mt Pleasant620191966
Dover519871966
Bethany Bch519901966
Frederica420141966

Carolina Wren Population Trend in Other States

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

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