BirdAnalyst
Species · BCR 16 · BBS 2026 Release · 1966–2025

Western Wood-Pewee In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauAerial insectivores

Western Wood-Pewee in Southern Rockies / Colorado Plateau has surged: up 132% on the route-weighted index since 1970.

+132%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 →
211Routes 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 →
57YearsYears 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 →

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 Southern Rockies / Colorado Plateau: up 131% on the route-weighted index since 1970.

Western Wood-Pewee In Southern Rockies / Colorado Plateau Population Forecast

If the recent trend holds, Western Wood-Pewee in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2030, near 7.1 (95% range 5.4–8.8). A 5-year backtest shows a typical error of ±11.7%, with 100% of held-out values landing inside the 95% band.

-4%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 →
7.1Projected 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 →
5.4–8.895% 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 →
±11.7%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 Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2030, near 7.1 (95% range 5.4–8.8). A 5-year backtest shows a typical error of ±11.7%, 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 →
20266.95.28.5
20276.95.38.6
20287.05.38.6
20297.05.48.7
20307.15.48.8

Routes In Southern Rockies / Colorado Plateau

Routes recording Western Wood-Pewee in Southern Rockies / Colorado Plateau.
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 →
WalsenburgCOLORADO582025
CokedaleCOLORADO542025
GallinasNEW-MEXICO382025
Angel Fire 2NEW-MEXICO372025
TarryallCOLORADO342025
ParlinCOLORADO332025
Wet Mtns.COLORADO312025
SawmillARIZONA292014
Cortez 2COLORADO292017
CastletonCOLORADO252025
Blackhead PkCOLORADO252025
Dolores RivCOLORADO222025
Ragged Mtn.COLORADO222025
GardnerCOLORADO222025
Navajo LakeUTAH222025
Gribbles PrkCOLORADO212025
Haycamp MesaCOLORADO212025
LudlowCOLORADO212025
Ryan ParkWYOMING212025
FalfaCOLORADO192025
Lake City 2COLORADO192025
Angel FireNEW-MEXICO192002
Bluewater LakeNEW-MEXICO192021
Dry ParkARIZONA182025
PecosNEW-MEXICO182017

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