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

Sedge Wren Population Trend in Indiana

All statesGrassland birds

Sedge Wren in Indiana has fallen sharply: down 71% on the route-weighted index since 1975.

-71%Since 1975TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
23Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
41YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Sedge Wren Trends in IndianaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Sedge Wren has fallen sharply in Indiana: down 71% on the route-weighted index since 1975.

Sedge Wren Population Forecast in Indiana

If the recent trend holds, Sedge Wren in Indiana is projected to stay roughly flat through 2029, near 0.03 (95% range 0.00–0.20). A 5-year backtest shows a typical error of ±66.5%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.03Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.2095% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±66.5%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Sedge Wren in Indiana is projected to stay roughly flat through 2029, near 0.03 (95% range 0.00–0.20). A 5-year backtest shows a typical error of ±66.5%, with 100% of held-out values landing inside the 95% band.19672029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20250.040.000.21
20260.040.000.21
20270.030.000.21
20280.030.000.20
20290.030.000.20

Sedge Wren Survey Routes in Indiana

Routes recording Sedge Wren in Indiana.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Middletown419941994
Packertown220041992
W Lafayette220001991
Milroy220041979
Celestine219971981
Hebron119961970
Knox120021996
Indiana Dune120051996
Middlebury120132013
Kankakee Sands120242007
Ellis120191976
Fowler120211985
Monticello120162016
Galveston120141990
Thorntown120101989
Brazil119791979
Jamestown119911990
Spencer119921967
Cumback119901983
New Phila120032003
Scottsburg119971997
Georgia120172017
Packertown 2120192006

Sedge Wren Population Trend in Other States

connecticutdelawareillinoisiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanew-hampshirenew-yorknorth-dakotaohiopennsylvaniasouth-dakotavermontvirginiawisconsin

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