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Species · South Dakota · BBS 2026 Release · 1966–2025

Western Wood-Pewee Population Trend in South Dakota

All statesAerial insectivores

Western Wood-Pewee in South Dakota has surged: up 110% on the route-weighted index since 1969.

+110%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 →
26Routes 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 Western Wood-Pewee Trends in South DakotaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Western Wood-Pewee has surged in South Dakota: up 110% on the route-weighted index since 1969.

Western Wood-Pewee Population Forecast in South Dakota

If the recent trend holds, Western Wood-Pewee in South Dakota is projected to fall about 36% by 2030 — from 3.3 in 2025 to a central estimate of 2.1 (95% range 1.1–3.0). A 5-year backtest shows a typical error of ±21.6%, with 80% of held-out values landing inside the 95% band.

-36%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 →
2.1Projected 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 →
1.1–3.095% 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 →
±21.6%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, Western Wood-Pewee in South Dakota is projected to fall about 36% by 2030 — from 3.3 in 2025 to a central estimate of 2.1 (95% range 1.1–3.0). A 5-year backtest shows a typical error of ±21.6%, with 80% of held-out values landing inside the 95% band.19672030
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 →
20262.01.03.0
20272.01.13.0
20282.01.13.0
20292.11.13.0
20302.11.13.0

Western Wood-Pewee Survey Routes in South Dakota

Routes recording Western Wood-Pewee in South Dakota.
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 →
Elk Mountain2520041992
Wind Cave Np2420251999
Black Fox2220171992
Hazelrodt1620251992
Silver City1620121992
Hill City1520131996
Roubaix Lk1419911967
Long Draw1420251992
Lightning Cr1320251992
Pleasant Val1220241992
Rochford1020251997
Custer920251967
Englewood520211992
Norbeck320021993
French Creek220052003
Owanka220131989
Cedar Pass219681968
Reva220251996
Ardmore220191977
Lacreek220251991
Cottonwood120101997
S. Pioneer120012001
Volunteer120251969
Maurine120021975
Lodgepole120132001

Western Wood-Pewee Population Trend in Other States

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