BirdAnalyst
Species · BCR 4 · BBS 2025 Release · 1966–2024

Orange-crowned Warbler In BCR 4

All regionsBCR 4Forest birds

Orange-crowned Warbler in BCR 4 has risen sharply: up 70% on the route-weighted index since 1978.

+70%Since 1978
68Routes In Region
45Years

Notable Signals

long arc increasecomputed index

Orange-crowned Warbler has risen sharply in BCR 4: up 70% on the route-weighted index since 1978.

Forecast

If the recent trend holds, Orange-crowned Warbler in BCR 4 is projected to rise about 41% by 2029 — from 15 in 2024 to a central estimate of 21 (95% range 14–28). A 5-year backtest shows a typical error of ±40.4%, with 20% of held-out values landing inside the 95% band.

+41%Change by 2029
21Projected 2029 index
14–2895% range
±40.4%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
2025211328
2026211428
2027211428
2028211428
2029211428

Routes In BCR 4

Routes recording Orange-crowned Warbler in BCR 4.
Kanuti CanynALASKA572024
SavageALASKA552024
HomerALASKA521982
ToklatALASKA512024
Unalakleet RiverALASKA372022
CohoeALASKA342023
Anchor RiverALASKA332024
KachemakALASKA322024
KalifonskyALASKA292023
CottonwoodALASKA281990
Moose CreekALASKA272022
Hatcher PassALASKA262024
NorthwayALASKA252023
MonahanALASKA232021
Burma RoadALASKA222024
KuskulanaALASKA222024
Chena RiverALASKA211988
RubyALASKA212024
DeltaALASKA192024
MatanuskaALASKA181983
L SalchaALASKA182023
EagleALASKA172024
Kenny LakeALASKA172024
TatalinaALASKA172019
Galena (Short)ALASKA172024

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