BirdAnalyst
Species · Oregon · BBS 2025 Release · 1966–2024

Townsend's Warbler Population Trend in Oregon

All statesForest birds

Townsend's Warbler in Oregon has surged: up 85% on the route-weighted index since 1970.

+85%Since 1970
62Routes In State
56Years

Notable Townsend's Warbler Trends in Oregon

long arc increasecomputed index

Townsend's Warbler has surged in Oregon: up 85% on the route-weighted index since 1970.

Townsend's Warbler Population Forecast in Oregon

If the recent trend holds, Townsend's Warbler in Oregon is projected to rise about 20% by 2029 — from 1.6 in 2024 to a central estimate of 1.9 (95% range 0.85–3.0). A 5-year backtest shows a typical error of ±28.2%, with 100% of held-out values landing inside the 95% band.

+20%Change by 2029
1.9Projected 2029 index
0.85–3.095% 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
20251.90.782.9
20261.90.803.0
20271.90.823.0
20281.90.833.0
20291.90.853.0

Townsend's Warbler Survey Routes in Oregon

Routes recording Townsend's Warbler in Oregon.
Eagle Creek3020221993
Black Mtn.2920041995
Hash Rock2520241983
Newbridge2220241993
Ochoco1820241993
Ochoco1719821972
Shellrock1420231969
Howard Mdws.1420241992
Hells Canyon1120221992
Wickiup1020241969
Barnhouse920241998
Flora820231986
Svensen819901990
Monument820241993
Granite720241986
Silver Creek720101996
Troy720241992
Summit Pr620241984
Molalla520241994
Emigrant Lake 2520192009
Mount Vernon420241986
Unity420241998
Cool Camp320091968
Scappoose320232023
Sandy River220062006

Townsend's Warbler Population Trend in Other States

alaskaidahomontanawashingtonwyoming

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