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

Brown Creeper In Sierra Nevada

All regionsSierra NevadaForest birds

Brown Creeper in Sierra Nevada has surged: up 137% on the route-weighted index since 1970.

+137%Since 1970
39Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Brown Creeper has surged in Sierra Nevada: up 137% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Brown Creeper in Sierra Nevada is projected to fall about 27% by 2029 — from 5.6 in 2024 to a central estimate of 4.1 (95% range 1.4–6.9). A 5-year backtest shows a typical error of ±29.9%, with 100% of held-out values landing inside the 95% band.

-27%Change by 2029
4.1Projected 2029 index
1.4–6.995% range
±29.9%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
20254.11.46.8
20264.11.46.8
20274.11.46.8
20284.11.46.9
20294.11.46.9

Routes In Sierra Nevada

Routes recording Brown Creeper in Sierra Nevada.
LumberyardCALIFORNIA202024
WestvilleCALIFORNIA152024
Last ChanceCALIFORNIA152019
Lassen ParkCALIFORNIA131989
Eagle LakeCALIFORNIA132024
Greenhorn MtCALIFORNIA122008
PlacervilleCALIFORNIA92024
Butte MeadowCALIFORNIA82014
LakeshoreCALIFORNIA82024
CoultervilleCALIFORNIA82019
ChilcootCALIFORNIA72024
DownievilleCALIFORNIA62024
Tuolumne GroveCALIFORNIA52024
RivertonCALIFORNIA52023
Tahoe NfCALIFORNIA51994
Meadow ValleyCALIFORNIA52024
Kings CanyonCALIFORNIA42024
Hat CreekCALIFORNIA42018
Pollock PinesCALIFORNIA42024
JohnsvilleCALIFORNIA32024
SattleyCALIFORNIA32016
GeneseeCALIFORNIA32024
Higgins CornCALIFORNIA32024
ChesterCALIFORNIA32017
Bass LakeCALIFORNIA22018

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