BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

Western Wood-Pewee In Great Basin

All regionsGreat BasinAerial insectivores

Western Wood-Pewee in Great Basin has increased: up 32% on the route-weighted index since 1970.

+32%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 →
194Routes 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 Great Basin. See the full index history below.

Western Wood-Pewee In Great Basin Population Forecast

If the recent trend holds, Western Wood-Pewee in Great Basin is projected to rise about 33% by 2029 — from 4.7 in 2024 to a central estimate of 6.2 (95% range 4.7–7.7). A 5-year backtest shows a typical error of ±27.8%, with 20% of held-out values landing inside the 95% band.

+33%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 →
6.2Projected 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 →
4.7–7.795% 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 →
±27.8%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 Great Basin is projected to rise about 33% by 2029 — from 4.7 in 2024 to a central estimate of 6.2 (95% range 4.7–7.7). A 5-year backtest shows a typical error of ±27.8%, with 20% 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 →
20256.04.57.5
20266.14.67.6
20276.14.67.6
20286.24.67.7
20296.24.77.7

Routes In Great Basin

Routes recording Western Wood-Pewee in Great Basin.
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 →
LeavenworthWASHINGTON512024
MacdoelCALIFORNIA482019
TwispWASHINGTON462024
Turnbull NwrWASHINGTON462023
Modoc Point 2OREGON372024
EwanWASHINGTON372019
Modoc PointOREGON312018
WaitsburgWASHINGTON302004
Magic MtnIDAHO282024
Lake ChelanWASHINGTON262024
Barnes ValOREGON251987
GiffordIDAHO242017
Iron GateCALIFORNIA222019
L. WenatcheeWASHINGTON222024
JoelIDAHO202024
SistersOREGON202024
HackamoreCALIFORNIA192010
Badger CreekOREGON192024
MaldenWASHINGTON192024
PomeroyWASHINGTON192024
BartleCALIFORNIA182021
LikelyCALIFORNIA172024
Mt HoodOREGON172024
SnowdenWASHINGTON172024
Lapham Res.OREGON162024

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