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

Mountain Chickadee In Sierra Nevada

All regionsSierra NevadaForest birds

Mountain Chickadee in Sierra Nevada has risen sharply: up 74% on the route-weighted index since 1970.

+74%Since 1970
38Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Mountain Chickadee has risen sharply in Sierra Nevada: up 74% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Mountain Chickadee in Sierra Nevada is projected to rise about 15% by 2029 — from 17 in 2024 to a central estimate of 19 (95% range 7.1–31). A 5-year backtest shows a typical error of ±18.1%, with 100% of held-out values landing inside the 95% band.

+15%Change by 2029
19Projected 2029 index
7.1–3195% range
±18.1%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
2025197.631
2026197.431
2027197.331
2028197.231
2029197.131

Routes In Sierra Nevada

Routes recording Mountain Chickadee in Sierra Nevada.
GoumazCALIFORNIA612011
Pine MountainCALIFORNIA552017
LumberyardCALIFORNIA532024
ChilcootCALIFORNIA452024
Lassen ParkCALIFORNIA441989
Last ChanceCALIFORNIA442019
Little TruckeeCALIFORNIA422023
Greenhorn MtCALIFORNIA372008
ChesterCALIFORNIA292017
Hat CreekCALIFORNIA282018
Eagle LakeCALIFORNIA272024
LakeshoreCALIFORNIA272024
Meadow ValleyCALIFORNIA272024
JohnsvilleCALIFORNIA262024
WestvilleCALIFORNIA242024
RivertonCALIFORNIA232023
CrestviewCALIFORNIA222024
GeneseeCALIFORNIA192024
Tahoe NfCALIFORNIA191994
Cottage SpgsCALIFORNIA181975
Butte MeadowCALIFORNIA172014
StrawberryCALIFORNIA172019
Forest Hill 2CALIFORNIA132005
SattleyCALIFORNIA122024
DownievilleCALIFORNIA92024

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