BirdAnalyst
Species · South Carolina · BBS 2025 Release · 1966–2024

Marsh Wren Population Trend in South Carolina

All statesForest birds

Marsh Wren in South Carolina has collapsed: down 95% on the route-weighted index since 1968.

-95%Since 1968
3Routes In State
19Years

Notable Marsh Wren Trends in South Carolina

long arc declinecomputed index

Marsh Wren has collapsed in South Carolina: down 95% on the route-weighted index since 1968.

Marsh Wren Population Forecast in South Carolina

If the recent trend holds, Marsh Wren in South Carolina is projected to fall about 100% by 2029 — from 0.10 in 2024 to a central estimate of 0.00 (95% range 0.00–0.96). A 5-year backtest shows a typical error of ±657.9%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–0.9695% range
±657.9%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
20250.000.000.96
20260.000.000.96
20270.000.000.96
20280.000.000.96
20290.000.000.96

Marsh Wren Survey Routes in South Carolina

Routes recording Marsh Wren in South Carolina.
Johns Isle219761966
Kiawah Island220241999
Jamestown119701970

Marsh Wren Population Trend in Other States

alabamaarizonacaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaslouisianamainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotatexasutahvermontvirginiawashingtonwisconsinwyoming

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