BirdAnalyst
Species · BCR 15 · BBS 2025 Release · 1966–2024

Western Bluebird In Sierra Nevada

All regionsSierra NevadaForest birds

Western Bluebird in Sierra Nevada has increased: up 40% on the route-weighted index since 1972.

+40%Since 1972
33Routes In Region
54Years

Notable Signals

No notable trend signals for Western Bluebird in Sierra Nevada. See the full index history below.

Forecast

If the recent trend holds, Western Bluebird in Sierra Nevada is projected to fall about 35% by 2029 — from 1.7 in 2024 to a central estimate of 1.1 (95% range 0.00–2.3). A 5-year backtest shows a typical error of ±37.1%, with 100% of held-out values landing inside the 95% band.

-35%Change by 2029
1.1Projected 2029 index
0.00–2.395% range
±37.1%Backtest error
19692029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20251.10.002.3
20261.10.002.3
20271.10.002.3
20281.10.002.3
20291.10.002.3

Routes In Sierra Nevada

Routes recording Western Bluebird in Sierra Nevada.
Hat CreekCALIFORNIA122018
Bass LakeCALIFORNIA82019
LakeshoreCALIFORNIA52024
Silver CityCALIFORNIA42013
Tuolumne GroveCALIFORNIA42024
SattleyCALIFORNIA42024
GeneseeCALIFORNIA42024
Pollock PinesCALIFORNIA42024
Pine MountainCALIFORNIA42017
WawonaCALIFORNIA32024
Eagle LakeCALIFORNIA22024
Greenhorn MtCALIFORNIA22008
Kings CanyonCALIFORNIA21990
Butte MeadowCALIFORNIA22013
DownievilleCALIFORNIA22013
RivertonCALIFORNIA22012
Forest HillCALIFORNIA22022
PlacervilleCALIFORNIA22024
CoultervilleCALIFORNIA22019
Lassen ParkCALIFORNIA11980
WestvilleCALIFORNIA12021
Cottage SpgsCALIFORNIA11969
JohnsvilleCALIFORNIA12023
WoodfordsCALIFORNIA12024
LumberyardCALIFORNIA12024

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