BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

Varied Thrush In Great Basin

All regionsGreat BasinForest birds

Varied Thrush in Great Basin has declined: down 47% on the route-weighted index since 1970.

-47%Since 1970
30Routes In Region
56Years

Notable Signals

No notable trend signals for Varied Thrush in Great Basin. See the full index history below.

Forecast

If the recent trend holds, Varied Thrush in Great Basin is projected to rise about 43% by 2029 — from 0.38 in 2024 to a central estimate of 0.54 (95% range 0.00–1.5). A 5-year backtest shows a typical error of ±72.2%, with 100% of held-out values landing inside the 95% band.

+43%Change by 2029
0.54Projected 2029 index
0.00–1.595% range
±72.2%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
20250.590.001.6
20260.580.001.5
20270.560.001.5
20280.550.001.5
20290.540.001.5

Routes In Great Basin

Routes recording Varied Thrush in Great Basin.
Cascade RivWASHINGTON212006
GlacierWASHINGTON172024
White ChuckWASHINGTON162024
IndexWASHINGTON131997
NewhalemWASHINGTON82024
IndexWASHINGTON81971
SnowdenWASHINGTON81973
Suiattle RivWASHINGTON72019
JosephOREGON51984
Index 2WASHINGTON52023
No CascadesWASHINGTON52019
RimrockWASHINGTON42024
KendallWASHINGTON42024
WinthropWASHINGTON31999
Camp ShermanOREGON21986
Davis LakeOREGON22001
SistersOREGON22012
TwispWASHINGTON22008
RonaldWASHINGTON22024
CarltonWASHINGTON21999
MazamaWASHINGTON22022
L. WenatcheeWASHINGTON22023
ConcreteWASHINGTON22024
E. Mt. AdamsWASHINGTON22011
Barnes ValOREGON11971

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