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Species · Utah · BBS 2025 Release · 1966–2024

Western Wood-Pewee Population Trend in Utah

All statesAerial insectivores

Western Wood-Pewee in Utah has risen sharply: up 60% on the route-weighted index since 1970.

+60%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 →
85Routes 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 →
53YearsYears 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 60% 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 18% by 2029 — from 2.4 in 2024 to a central estimate of 1.9 (95% range 0.14–3.8). A 5-year backtest shows a typical error of ±17%, with 100% of held-out values landing inside the 95% band.

-18%Change 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 →
1.9Projected 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 →
0.14–3.895% 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 →
±17%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 18% by 2029 — from 2.4 in 2024 to a central estimate of 1.9 (95% range 0.14–3.8). A 5-year backtest shows a typical error of ±17%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20251.90.123.7
20261.90.133.7
20271.90.133.7
20281.90.143.8
20291.90.143.8

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 →
Bryce Canyon2420241990
Dixie Nf1820241993
Navajo Lake1720241968
Hanna1720241997
Beaver1220241971
Glen Canyon1220071996
La Sal920001993
Heber Mtn.820241996
Uintah Nf719941987
Alton720111997
Beck619871969
Beryl620191988
Wasatch Nf520241988
Gooseberry520241994
Moon Lake 2520232004
Boulder420181986
Soapstone420241992
Kamas420242010
Timpie Spg320021993
Altonah320151978
Jensen320242002
Fish Lake Nf320241992
Hatch320242004
La Sal 2320062003
La Sal 3320242007

Western Wood-Pewee Population Trend in Other States

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