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

Bewick's Wren In Sierra Nevada

All regionsSierra NevadaForest birds

Bewick's Wren in Sierra Nevada has fallen sharply: down 72% on the route-weighted index since 1970.

-72%Since 1970
33Routes In Region
56Years

Notable Signals

long arc declinecomputed index

Bewick's Wren has fallen sharply in Sierra Nevada: down 72% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Bewick's Wren in Sierra Nevada is projected to rise about 65% by 2029 — from 0.47 in 2024 to a central estimate of 0.78 (95% range 0.00–2.4). A 5-year backtest shows a typical error of ±80.6%, with 100% of held-out values landing inside the 95% band.

+65%Change by 2029
0.78Projected 2029 index
0.00–2.495% range
±80.6%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
20250.850.002.5
20260.830.002.5
20270.810.002.5
20280.800.002.4
20290.780.002.4

Routes In Sierra Nevada

Routes recording Bewick's Wren in Sierra Nevada.
Silver CityCALIFORNIA152013
Cottage SpgsCALIFORNIA101974
PaxtonCALIFORNIA42018
Meadow ValleyCALIFORNIA42021
RivertonCALIFORNIA32022
ChesterCALIFORNIA32017
WawonaCALIFORNIA32024
LumberyardCALIFORNIA22019
Kings CanyonCALIFORNIA22024
SattleyCALIFORNIA21994
Butte MeadowCALIFORNIA22012
GeneseeCALIFORNIA22023
Higgins CornCALIFORNIA22024
Forest HillCALIFORNIA22022
Lassen ParkCALIFORNIA11986
Eagle LakeCALIFORNIA12024
WestvilleCALIFORNIA12023
Bass LakeCALIFORNIA12019
JohnsvilleCALIFORNIA11985
WoodfordsCALIFORNIA12018
Greenhorn MtCALIFORNIA12008
Tuolumne GroveCALIFORNIA12024
DownievilleCALIFORNIA12015
Hat CreekCALIFORNIA12017
LakeshoreCALIFORNIA12006

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