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

Wilson's Warbler In BCR 4

All regionsBCR 4Forest birds

Wilson's Warbler in BCR 4 has edged up: up 22% on the route-weighted index since 1978.

+22%Since 1978
68Routes In Region
45Years

Notable Signals

No notable trend signals for Wilson's Warbler in BCR 4. See the full index history below.

Forecast

If the recent trend holds, Wilson's Warbler in BCR 4 is projected to rise about 32% by 2029 — from 9.2 in 2024 to a central estimate of 12 (95% range 4.9–19). A 5-year backtest shows a typical error of ±50.3%, with 100% of held-out values landing inside the 95% band.

+32%Change by 2029
12Projected 2029 index
4.9–1995% range
±50.3%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
2025124.819
2026124.819
2027124.819
2028124.919
2029124.919

Routes In BCR 4

Routes recording Wilson's Warbler in BCR 4.
ToklatALASKA732024
SavageALASKA542024
MaclarenALASKA422024
HomerALASKA421982
Paxson LakeALASKA371997
CircleALASKA262024
Caribou Mtn.ALASKA212024
MonahanALASKA192021
Pinoche Tral (Short)ALASKA181984
DeltaALASKA172024
Kenny LakeALASKA142023
Chena RiverALASKA111988
Hatcher PassALASKA112024
CantwellALASKA102021
Goose BayALASKA101982
Kanuti LakeALASKA102024
Nabesna RoadALASKA102024
Chatanika RALASKA92023
NebesnaALASKA91975
Donelly DomeALASKA92019
TatalinaALASKA82019
Lake LouiseALASKA72014
Unalakleet RiverALASKA72024
Mt. FairplayALASKA72024
Anvik RiverALASKA72024

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