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

Sedge Wren Population Trend in Iowa

All statesGrassland birds

Sedge Wren in Iowa has surged: up 173% on the route-weighted index since 1970.

+173%Since 1970
34Routes In State
55Years

Notable Sedge Wren Trends in Iowa

long arc increasecomputed index

Sedge Wren has surged in Iowa: up 173% on the route-weighted index since 1970.

Sedge Wren Population Forecast in Iowa

If the recent trend holds, Sedge Wren in Iowa is projected to rise about 52% by 2029 — from 0.59 in 2024 to a central estimate of 0.90 (95% range 0.14–1.7). A 5-year backtest shows a typical error of ±109.3%, with 100% of held-out values landing inside the 95% band.

+52%Change by 2029
0.90Projected 2029 index
0.14–1.795% range
±109.3%Backtest error
19682029
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
20250.850.091.6
20260.860.101.6
20270.880.111.6
20280.890.121.7
20290.900.141.7

Sedge Wren Survey Routes in Iowa

Routes recording Sedge Wren in Iowa.
Rock Valley820191988
Davis Corner720241970
Bedford620181991
Brooklyn420111983
Alice419991985
Kanawha420191999
Clare420191999
Wales320181993
Gaza320191993
College Spgs 2320102009
Melrose220102000
Burchinal220241995
Bryant219971970
Williamsburg220071973
Red Rock220101993
Panther220181990
Maquoketa220191968
Hudson220091985
Dinsdale220051981
Scranton220221971
Washta220101992
Festina220241968
Garner219881971
Titonka220241985
Mt Hamill120131996

Sedge Wren Population Trend in Other States

connecticutdelawareillinoisindianakansaskentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanew-hampshirenew-yorknorth-dakotaohiopennsylvaniasouth-dakotavermontvirginiawisconsin

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