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

Sedge Wren Population Trend in Wisconsin

All statesGrassland birds

Sedge Wren in Wisconsin has declined: down 41% on the route-weighted index since 1968.

-41%Since 1968TrendPercent 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 →
93Routes 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 →
58YearsYears 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 WisconsinNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Sedge Wren in Wisconsin. See the full index history below.

Sedge Wren Population Forecast in Wisconsin

If the recent trend holds, Sedge Wren in Wisconsin is projected to stay roughly flat through 2029, near 2.3 (95% range 0.63–4.0). A 5-year backtest shows a typical error of ±48.8%, with 100% of held-out values landing inside the 95% band.

+6%Change 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 →
2.3Projected 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 →
0.63–4.095% 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 →
±48.8%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 Wisconsin is projected to stay roughly flat through 2029, near 2.3 (95% range 0.63–4.0). A 5-year backtest shows a typical error of ±48.8%, with 100% of held-out values landing inside the 95% band.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 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 →
20252.40.714.1
20262.40.694.1
20272.40.674.1
20282.30.654.0
20292.30.634.0

Sedge Wren Survey Routes in Wisconsin

Routes recording Sedge Wren in Wisconsin.
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 →
Gilman3220241966
Cumberland2120241966
Holway1919891967
Weirgor Springs1520241999
Stetsonville1320241990
River Falls1220241998
Omro 21120242002
N Andover1019961971
Weyerhauser820241966
Unity820241967
Wis Rapids820231969
Verona820241994
Flambeau620241998
Mather520231966
Bayfield420241967
Merrill420241966
Clintonville420241967
Newburg Crns420221967
Kendall420231970
Rolling Pr420151966
Amnicon Falls420241998
Gilmanton320091967
Cadott320241968
Manawa320231966
Pigeon Creek320221999

Sedge Wren Population Trend in Other States

connecticutdelawareillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanew-hampshirenew-yorknorth-dakotaohiopennsylvaniasouth-dakotavermontvirginia

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