BirdAnalyst
Species · BCR 5 · BBS 2025 Release · 1966–2024

Varied Thrush In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestForest birds

Varied Thrush in Northern Pacific Rainforest has surged: up 366% on the route-weighted index since 1970.

+366%Since 1970
116Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Varied Thrush has surged in Northern Pacific Rainforest: up 366% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Varied Thrush in Northern Pacific Rainforest is projected to rise about 36% by 2029 — from 14 in 2024 to a central estimate of 19 (95% range 14–24). A 5-year backtest shows a typical error of ±25.1%, with 100% of held-out values landing inside the 95% band.

+36%Change by 2029
19Projected 2029 index
14–2495% range
±25.1%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
2025181323
2026181324
2027191324
2028191424
2029191424

Routes In Northern Pacific Rainforest

Routes recording Varied Thrush in Northern Pacific Rainforest.
Chichagof IsALASKA1552024
HoonahALASKA1452024
Copper RiverALASKA982011
SewardALASKA951992
Yakutat (Short)ALASKA941984
Kuiu IslandALASKA932010
PetersburgALASKA791987
Stikine RiverALASKA692024
Redwood N.P. 2CALIFORNIA672013
Harlequin L.ALASKA592024
HyderALASKA592009
Sitka (Short)ALASKA501992
Mitkof IsleALASKA492024
Redwood N.P.CALIFORNIA492010
HopeALASKA472024
Whale PassALASKA462024
CraigALASKA452024
Thorne Bay 2ALASKA432024
Zimovia StrtALASKA402024
Moose PassALASKA391992
Thorne BayALASKA362012
Mt RainierWASHINGTON342021
SitkaALASKA312024
CordovaALASKA302024
JuneauALASKA292024

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