BirdAnalyst
Species · BCR 33 · BBS 2026 Release · 1966–2025

Western Wood-Pewee In Sonoran and Mojave Deserts

All regionsSonoran and Mojave DesertsAerial insectivores

Western Wood-Pewee in Sonoran and Mojave Deserts has declined: down 45% on the route-weighted index since 1971.

-45%Since 1971TrendPercent 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 →
23Routes 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 →
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 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 Western Wood-Pewee in Sonoran and Mojave Deserts. See the full index history below.

Western Wood-Pewee In Sonoran and Mojave Deserts Population Forecast

If the recent trend holds, Western Wood-Pewee in Sonoran and Mojave Deserts is projected to stay roughly flat through 2030, near 0.28 (95% range 0.00–0.65). A 5-year backtest shows a typical error of ±50.3%, with 100% of held-out values landing inside the 95% band.

-3%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 →
0.28Projected 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 →
0.00–0.6595% 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 →
±50.3%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 Sonoran and Mojave Deserts is projected to stay roughly flat through 2030, near 0.28 (95% range 0.00–0.65). A 5-year backtest shows a typical error of ±50.3%, 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 →
20260.270.000.65
20270.280.000.65
20280.280.000.65
20290.280.000.65
20300.280.000.65

Routes In Sonoran and Mojave Deserts

Routes recording Western Wood-Pewee in Sonoran and Mojave Deserts.
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 →
Kelso ValleyCALIFORNIA72025
BlytheCALIFORNIA51974
Squaw PeakARIZONA41968
FlorenceARIZONA31971
Cibola LakeARIZONA31994
PearblossomCALIFORNIA32024
WildroseCALIFORNIA21994
OnyxCALIFORNIA22015
BrawleyCALIFORNIA21971
LagunaARIZONA11972
CoolidgeARIZONA11985
RivieraARIZONA12021
Cactus ForestARIZONA12025
Anza BorregoCALIFORNIA12024
InyokernCALIFORNIA12002
Alamo RiverCALIFORNIA11990
Imperial DamCALIFORNIA11973
CimaCALIFORNIA11975
Lone PineCALIFORNIA12023
Joshua TreeCALIFORNIA12002
Val Of FireNEVADA11991
NelsonNEVADA12007
Ash MeadowsNEVADA12019

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