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

Townsend's Warbler In Great Basin

All regionsGreat BasinForest birds

Townsend's Warbler in Great Basin has increased: up 27% on the route-weighted index since 1970.

+27%Since 1970
40Routes In Region
56Years

Notable Signals

No notable trend signals for Townsend's Warbler in Great Basin. See the full index history below.

Forecast

If the recent trend holds, Townsend's Warbler in Great Basin is projected to rise about 41% by 2029 — from 1.2 in 2024 to a central estimate of 1.7 (95% range 0.77–2.5). A 5-year backtest shows a typical error of ±28.2%, with 100% of held-out values landing inside the 95% band.

+41%Change by 2029
1.7Projected 2029 index
0.77–2.595% range
±28.2%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
20251.60.742.5
20261.60.752.5
20271.60.762.5
20281.60.772.5
20291.70.772.5

Routes In Great Basin

Routes recording Townsend's Warbler in Great Basin.
Blewett PassWASHINGTON872024
RimrockWASHINGTON282024
Index 2WASHINGTON172023
No CascadesWASHINGTON142019
LeavenworthWASHINGTON112024
MazamaWASHINGTON102022
Cascade RivWASHINGTON102006
RonaldWASHINGTON92024
GlacierWASHINGTON82024
SquirrelIDAHO71994
L. WenatcheeWASHINGTON72024
ConcreteWASHINGTON52024
Dell SpringOREGON21999
Davis LakeOREGON22024
Wizard FallsOREGON22024
IndexWASHINGTON21971
SnowdenWASHINGTON22003
WinthropWASHINGTON22022
White ChuckWASHINGTON22024
CarltonWASHINGTON22022
PomeroyWASHINGTON22002
GiffordIDAHO11991
JoelIDAHO12011
PaisleyOREGON12011
Mt HoodOREGON12023

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