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Species · BCR 24 · BBS 2025 Release · 1966–2024

Sedge Wren In Central Hardwoods

All regionsCentral HardwoodsGrassland birds

Sedge Wren in Central Hardwoods has fallen sharply: down 68% on the route-weighted index since 1973.

-68%Since 1973TrendPercent 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 →
12Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
19YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable 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 Central Hardwoods. See the full index history below.

Sedge Wren In Central Hardwoods Population Forecast

If the recent trend holds, Sedge Wren in Central Hardwoods is projected to stay roughly flat through 2022, near 0.01 (95% range 0.00–0.06). A 5-year backtest shows a typical error of ±48.6%, with 80% of held-out values landing inside the 95% band.

n/aChange by 2022TrendPercent 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 →
0.01Projected 2022 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0695% 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 →
±48.6%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 Central Hardwoods is projected to stay roughly flat through 2022, near 0.01 (95% range 0.00–0.06). A 5-year backtest shows a typical error of ±48.6%, with 80% of held-out values landing inside the 95% band.19672022
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 →
20180.010.000.06
20190.010.000.06
20200.010.000.06
20210.010.000.06
20220.010.000.06

Routes In Central Hardwoods

Routes recording Sedge Wren in Central Hardwoods.
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 →
HudsonKENTUCKY31973
YorkILLINOIS22005
CelestineINDIANA21997
BrazilINDIANA11979
SpencerINDIANA11992
CumbackINDIANA11990
New PhilaINDIANA12003
ScottsburgINDIANA11997
GeorgiaINDIANA12017
MerrimacKENTUCKY12004
EastviewKENTUCKY11973
SyracuseMISSOURI11998

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