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

Hermit Warbler In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestForest birds

Hermit Warbler in Northern Pacific Rainforest has risen sharply: up 57% on the route-weighted index since 1970.

+57%Since 1970
104Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Hermit Warbler has risen sharply in Northern Pacific Rainforest: up 57% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Hermit Warbler in Northern Pacific Rainforest is projected to rise about 36% by 2029 — from 6.5 in 2024 to a central estimate of 8.8 (95% range 5.2–12). A 5-year backtest shows a typical error of ±25.9%, with 100% of held-out values landing inside the 95% band.

+36%Change by 2029
8.8Projected 2029 index
5.2–1295% range
±25.9%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
20258.55.012
20268.65.012
20278.65.112
20288.75.212
20298.85.212

Routes In Northern Pacific Rainforest

Routes recording Hermit Warbler in Northern Pacific Rainforest.
ClearwaterOREGON1382021
FisherOREGON782010
RuchOREGON702023
Klickitat MtOREGON611996
Blue RiverOREGON592024
Trask SummitOREGON472024
Mt. AdamsWASHINGTON472024
Martins FyCALIFORNIA462009
Pilot CreekCALIFORNIA461996
Friday RidgeCALIFORNIA392024
Hazel CampOREGON362022
Lonesome RdgCALIFORNIA342014
Cool CampOREGON342013
LoraneOREGON302024
South Fork MtnCALIFORNIA292022
Warner Mtn.OREGON292024
Redwood N.P. 2CALIFORNIA272013
CinderellaOREGON262024
Harlan 2OREGON252024
Fisher 2OREGON252024
Nicolai Mtn.OREGON242024
SelmaOREGON222024
HarlanOREGON182009
HiouchiCALIFORNIA142014
Secret ValOREGON132022

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