BirdAnalyst
Species · BCR 13 · BBS 2025 Release · 1966–2024

Sedge Wren In Lower Great Lakes / St. Lawrence Plain

All regionsLower Great Lakes / St. Lawrence PlainGrassland birds

Sedge Wren in Lower Great Lakes / St. Lawrence Plain has increased: up 34% on the route-weighted index since 1969.

+34%Since 1969TrendPercent 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 →
19Routes 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 →
28YearsYears 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 Lower Great Lakes / St. Lawrence Plain. See the full index history below.

Sedge Wren In Lower Great Lakes / St. Lawrence Plain Population Forecast

If the recent trend holds, Sedge Wren in Lower Great Lakes / St. Lawrence Plain is projected to stay roughly flat through 2022, near 0.03 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±97.7%, with 100% 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 →
0.03Projected 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 →
0.00–0.0895% 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 →
±97.7%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 Lower Great Lakes / St. Lawrence Plain is projected to stay roughly flat through 2022, near 0.03 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±97.7%, with 100% of held-out values landing inside the 95% band.19662022
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 →
20180.030.000.08
20190.030.000.08
20200.030.000.08
20210.030.000.08
20220.030.000.08

Routes In Lower Great Lakes / St. Lawrence Plain

Routes recording Sedge Wren in Lower Great Lakes / St. Lawrence Plain.
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 →
DuanesburgNEW-YORK21974
West SenecaNEW-YORK21986
E YoungstownNEW-YORK21986
PulaskiNEW-YORK22016
N WilmurtNEW-YORK21973
HebronOHIO22004
Mt MorrisNEW-YORK11971
Cherry HillNEW-YORK12008
NashvilleNEW-YORK11973
PenfieldNEW-YORK11975
N Victory 2NEW-YORK11981
Alder CreekNEW-YORK11985
SalemNEW-YORK11970
OgdensburgNEW-YORK11993
PhiladelphiaNEW-YORK12010
PittsfieldOHIO12016
LattasburgOHIO11991
HiramOHIO12017
TeeplevillePENNSYLVANIA11974

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