BirdAnalyst
Species · BCR 12 · BBS 2026 Release · 1966–2025

Sedge Wren In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionGrassland birds

Sedge Wren in Boreal Hardwood Transition has held roughly steady: up 1% on the route-weighted index since 1968.

+1%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 →
99Routes 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 →
59YearsYears 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 Boreal Hardwood Transition. See the full index history below.

Sedge Wren In Boreal Hardwood Transition Population Forecast

If the recent trend holds, Sedge Wren in Boreal Hardwood Transition is projected to stay roughly flat through 2030, near 3.2 (95% range 1.5–5.0). A 5-year backtest shows a typical error of ±18.8%, with 100% of held-out values landing inside the 95% band.

+3%Change by 2030TrendPercent 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 →
3.2Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
1.5–5.095% 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 →
±18.8%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 Boreal Hardwood Transition is projected to stay roughly flat through 2030, near 3.2 (95% range 1.5–5.0). A 5-year backtest shows a typical error of ±18.8%, with 100% of held-out values landing inside the 95% band.19662030
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 →
20263.21.55.0
20273.21.55.0
20283.21.55.0
20293.21.55.0
20303.21.55.0

Routes In Boreal Hardwood Transition

Routes recording Sedge Wren in Boreal Hardwood Transition.
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 →
GilmanWISCONSIN382025
BackusMINNESOTA322025
MahtowaMINNESOTA242023
McgregorMINNESOTA242025
Wigwam BayMINNESOTA162023
CromwellMINNESOTA132025
GreenbushMINNESOTA122025
Pine RiverMINNESOTA112025
DebsMINNESOTA112025
BrainerdMINNESOTA112024
Mille LacsMINNESOTA92024
LudeMINNESOTA92025
Sherry LakeMINNESOTA82022
BayfieldWISCONSIN82025
BashawWISCONSIN82025
Weirgor SpringsWISCONSIN82025
Little ForkMINNESOTA72024
WaskishMINNESOTA62025
NebishMINNESOTA62025
Amnicon FallsWISCONSIN62025
FlambeauWISCONSIN62025
Island LakeMINNESOTA52015
Lake CityMICHIGAN42010
PickfordMICHIGAN42025
FloodwoodMINNESOTA42025

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.