BirdAnalyst
Species · BCR 10 · BBS 2025 Release · 1966–2024

Orange-crowned Warbler In Northern Rockies

All regionsNorthern RockiesForest birds

Orange-crowned Warbler in Northern Rockies has surged: up 190% on the route-weighted index since 1970.

+190%Since 1970
123Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Orange-crowned Warbler has surged in Northern Rockies: up 190% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Orange-crowned Warbler in Northern Rockies is projected to rise about 64% by 2029 — from 1.1 in 2024 to a central estimate of 1.9 (95% range 1.3–2.5). A 5-year backtest shows a typical error of ±29.8%, with 60% of held-out values landing inside the 95% band.

+64%Change by 2029
1.9Projected 2029 index
1.3–2.595% range
±29.8%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
20251.81.22.4
20261.81.22.4
20271.81.22.4
20281.81.22.5
20291.91.32.5

Routes In Northern Rockies

Routes recording Orange-crowned Warbler in Northern Rockies.
CusickWASHINGTON272024
CoolinIDAHO192024
Rochat DivdeIDAHO162023
LaurierWASHINGTON152022
ChewelahWASHINGTON142021
KellerWASHINGTON132007
CloverlandWASHINGTON122024
Omak CreekWASHINGTON112024
TroyOREGON92024
Black Mtn.OREGON82004
DesolationOREGON81999
AlpineWYOMING82024
Prior FlatsWYOMING82017
Twin LakesWASHINGTON72024
GoldenIDAHO61995
ArleeMONTANA62024
Whitefish LakeMONTANA62024
Inside RoadMONTANA62024
Greenoagh 3MONTANA62024
Howard Mdws.OREGON62019
Spring LakeWASHINGTON62024
Sullivan LkWASHINGTON61999
MivodenIDAHO52023
GraniteOREGON51989
PolsonMONTANA42019

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