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

Bushtit In Sierra Nevada

All regionsSierra NevadaGeneralists

Bushtit in Sierra Nevada has fallen sharply: down 71% on the route-weighted index since 1970.

-71%Since 1970
27Routes In Region
56Years

Notable Signals

long arc declinecomputed index

Bushtit has fallen sharply in Sierra Nevada: down 71% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Bushtit in Sierra Nevada is projected to rise about 21% by 2029 — from 1.4 in 2024 to a central estimate of 1.7 (95% range 0.00–5.3). A 5-year backtest shows a typical error of ±44.1%, with 100% of held-out values landing inside the 95% band.

+21%Change by 2029
1.7Projected 2029 index
0.00–5.395% range
±44.1%Backtest error
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 index95% low95% high
20251.90.005.4
20261.80.005.4
20271.80.005.3
20281.80.005.3
20291.70.005.3

Routes In Sierra Nevada

Routes recording Bushtit in Sierra Nevada.
Greenhorn MtCALIFORNIA172006
Higgins CornCALIFORNIA152024
CoultervilleCALIFORNIA152019
Tuolumne GroveCALIFORNIA92015
SattleyCALIFORNIA81992
GeneseeCALIFORNIA81983
PaxtonCALIFORNIA82024
Cottage SpgsCALIFORNIA41975
JohnsvilleCALIFORNIA42015
Butte MeadowCALIFORNIA41990
Meadow ValleyCALIFORNIA42018
Bass LakeCALIFORNIA32019
LumberyardCALIFORNIA31981
Kings CanyonCALIFORNIA32016
DownievilleCALIFORNIA32019
Hat CreekCALIFORNIA31998
LakeshoreCALIFORNIA32024
WestvilleCALIFORNIA22023
Silver CityCALIFORNIA22013
Forest HillCALIFORNIA22022
Pine MountainCALIFORNIA22015
ChilcootCALIFORNIA22008
Eagle LakeCALIFORNIA12022
WoodfordsCALIFORNIA12024
RivertonCALIFORNIA12023

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