BirdAnalyst
Species · BCR 16 · BBS 2025 Release · 1966–2024

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 108% on the route-weighted index since 1970.

+108%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 →
209Routes 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 →
56YearsYears 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 108% 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 2029, near 7.0 (95% range 5.3–8.7). A 5-year backtest shows a typical error of ±12.9%, with 100% of held-out values landing inside the 95% band.

+1%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 →
7.0Projected 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 →
5.3–8.795% 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 →
±12.9%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 2029, near 7.0 (95% range 5.3–8.7). A 5-year backtest shows a typical error of ±12.9%, 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 →
20256.85.18.4
20266.85.18.5
20276.95.28.6
20286.95.38.6
20297.05.38.7

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 →
CokedaleCOLORADO602024
LudlowCOLORADO472016
WalsenburgCOLORADO392024
Angel Fire 2NEW-MEXICO352024
CastletonCOLORADO312024
SawmillARIZONA292014
Wet Mtns.COLORADO292024
Cortez 2COLORADO292017
GardnerCOLORADO272024
Gribbles PrkCOLORADO262024
Dry ParkARIZONA242024
Lake City 2COLORADO242024
Bryce CanyonUTAH242024
FalfaCOLORADO222024
PiedraCOLORADO212024
Cochetopa PassCOLORADO212024
GuffeyCOLORADO192024
Dolores RivCOLORADO192024
Animas 2COLORADO192021
Angel FireNEW-MEXICO192002
Bluewater LakeNEW-MEXICO192021
WestcliffeCOLORADO182024
PecosNEW-MEXICO182017
Dixie NfUTAH182024
Navajo LakeUTAH172024

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