BirdAnalyst
Species · BCR 10 · BBS 2025 Release · 1966–2024

Western Wood-Pewee In Northern Rockies

All regionsNorthern RockiesAerial insectivores

Western Wood-Pewee in Northern Rockies has increased: up 37% on the route-weighted index since 1970.

+37%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 →
186Routes 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 →

No notable trend signals for Western Wood-Pewee in Northern Rockies. See the full index history below.

Western Wood-Pewee In Northern Rockies Population Forecast

If the recent trend holds, Western Wood-Pewee in Northern Rockies is projected to stay roughly flat through 2029, near 6.0 (95% range 4.2–7.8). A 5-year backtest shows a typical error of ±15%, with 80% of held-out values landing inside the 95% band.

+0%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 →
6.0Projected 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 →
4.2–7.895% 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 →
±15%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 Northern Rockies is projected to stay roughly flat through 2029, near 6.0 (95% range 4.2–7.8). A 5-year backtest shows a typical error of ±15%, with 80% 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 →
20255.84.07.6
20265.94.17.7
20275.94.17.7
20286.04.27.7
20296.04.27.8

Routes In Northern Rockies

Routes recording Western Wood-Pewee in Northern Rockies.
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 →
Deer ParkWASHINGTON462015
ChewelahWASHINGTON432021
Mount VernonOREGON402024
CabartonIDAHO372023
Silver CreekOREGON362024
MidvaleWYOMING332024
LaurierWASHINGTON322022
CascadeIDAHO301984
L Pend O NwrWASHINGTON302024
NinemileMONTANA292024
Clyde ParkMONTANA272024
NewbridgeOREGON262024
SulaMONTANA252024
DonnellyOREGON222006
FloraOREGON212023
Summit PrOREGON202024
KellerWASHINGTON202007
DesolationOREGON192007
Spring LakeWASHINGTON192024
CloverlandWASHINGTON192024
NaplesIDAHO182024
Donelly 2OREGON182024
NorthportWASHINGTON182024
Pablo Res.MONTANA172024
Freeman CreekMONTANA172016

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