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Species · Utah · BBS 2026 Release · 1966–2025

Western Wood-Pewee Population Trend in Utah

All statesAerial insectivores

Western Wood-Pewee in Utah has risen sharply: up 68% on the route-weighted index since 1970.

+68%Since 1970TrendPercent 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 →
86Routes 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 →
54YearsYears 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 UtahNotable 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 risen sharply in Utah: up 68% on the route-weighted index since 1970.

Western Wood-Pewee Population Forecast in Utah

If the recent trend holds, Western Wood-Pewee in Utah is projected to fall about 17% by 2030 — from 2.4 in 2025 to a central estimate of 2.0 (95% range 0.19–3.8). A 5-year backtest shows a typical error of ±19.7%, with 100% of held-out values landing inside the 95% band.

-17%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 →
2.0Projected 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 →
0.19–3.895% 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 →
±19.7%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, Western Wood-Pewee in Utah is projected to fall about 17% by 2030 — from 2.4 in 2025 to a central estimate of 2.0 (95% range 0.19–3.8). A 5-year backtest shows a typical error of ±19.7%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20262.00.173.8
20272.00.173.8
20282.00.183.8
20292.00.193.8
20302.00.193.8

Western Wood-Pewee Survey Routes in Utah

Routes recording Western Wood-Pewee in Utah.
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 →
Navajo Lake2220251968
Hanna1720241997
Soapstone1520251992
Skyline Driv1220251986
Glen Canyon1220071996
Dixie Nf1220251993
Bryce Canyon1220251990
Beaver1120251971
Main Canyon1020251988
Heber Mtn.1020251996
La Sal920001993
Gooseberry820251994
La Sal 3820252007
Uintah Nf719941987
Hatch720252004
Alton720111997
Beck619871969
Beryl620191988
Wasatch Nf520241988
Moon Lake 2520232004
Newcastle520251997
Alton 2520252023
Kamas420242010
Wellington 3320252012
Timpie Spg320021993

Western Wood-Pewee Population Trend in Other States

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