BirdAnalyst
Species · BCR 10 · BBS 2026 Release · 1966–2025

Bushtit In Northern Rockies

All regionsNorthern RockiesForest birds

Bushtit in Northern Rockies has declined: down 40% on the route-weighted index since 1978.

-40%Since 1978TrendPercent 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 →
15Routes 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 →
25YearsYears 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 Bushtit in Northern Rockies. See the full index history below.

Bushtit In Northern Rockies Population Forecast

If the recent trend holds, Bushtit in Northern Rockies is projected to fall about 73% by 2030 — from 0.15 in 2025 to a central estimate of 0.04 (95% range 0.00–0.22). A 5-year backtest shows a typical error of ±59.1%, with 100% of held-out values landing inside the 95% band.

-73%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 →
0.04Projected 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 →
0.00–0.2295% 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 →
±59.1%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, Bushtit in Northern Rockies is projected to fall about 73% by 2030 — from 0.15 in 2025 to a central estimate of 0.04 (95% range 0.00–0.22). A 5-year backtest shows a typical error of ±59.1%, with 100% of held-out values landing inside the 95% band.19732030
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 →
20260.050.000.23
20270.050.000.23
20280.040.000.23
20290.040.000.22
20300.040.000.22

Routes In Northern Rockies

Routes recording Bushtit 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 →
MadrasOREGON122025
OchocoOREGON122014
LogdellOREGON102025
Eagle RockOREGON81977
LayCOLORADO72004
Mtn ViewWYOMING51980
Summit PrOREGON31982
MonumentOREGON32022
BridgeportOREGON22011
MaybellCOLORADO12004
Browns ParkCOLORADO12005
TwickenhamOREGON12025
Saleratus CrUTAH12004
DiamondvilleWYOMING11979
Rock SpringsWYOMING12012

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