BirdAnalyst
Species · BCR 17 · BBS 2025 Release · 1966–2024

Sedge Wren In Badlands and Prairies

All regionsBadlands and PrairiesGrassland birds

Sedge Wren in Badlands and Prairies has declined: down 48% on the route-weighted index since 1997.

-48%Since 1997TrendPercent 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 →
15Routes 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 →
23YearsYears 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 Badlands and Prairies. See the full index history below.

Sedge Wren In Badlands and Prairies Population Forecast

If the recent trend holds, Sedge Wren in Badlands and Prairies is projected to stay roughly flat through 2029, near 0.08 (95% range 0.00–0.18). A 5-year backtest shows a typical error of ±274.8%, 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 →
0.08Projected 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 →
0.00–0.1895% 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 →
±274.8%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 Badlands and Prairies is projected to stay roughly flat through 2029, near 0.08 (95% range 0.00–0.18). A 5-year backtest shows a typical error of ±274.8%, with 100% of held-out values landing inside the 95% band.19812029
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 →
20250.070.000.17
20260.070.000.17
20270.080.000.18
20280.080.000.18
20290.080.000.18

Routes In Badlands and Prairies

Routes recording Sedge Wren in Badlands and Prairies.
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 →
BowmanNORTH-DAKOTA62019
ChamberlainSOUTH-DAKOTA32010
LacreekSOUTH-DAKOTA21996
Ft YatesNORTH-DAKOTA12003
DickinsonNORTH-DAKOTA12024
Dunn CenterNORTH-DAKOTA12021
GorhamNORTH-DAKOTA12015
Cedar CreekNORTH-DAKOTA12010
GolvaNORTH-DAKOTA11997
Glen UllinNORTH-DAKOTA12022
SolenNORTH-DAKOTA12024
CarsonNORTH-DAKOTA12019
Ft ThompsonSOUTH-DAKOTA12011
MarcusSOUTH-DAKOTA12002
White RiverSOUTH-DAKOTA11998

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