BirdAnalyst
Species · BCR 3 · BBS 2025 Release · 1966–2024

Willow Ptarmigan In BCR 3

All regionsBCR 3Generalists

Willow Ptarmigan in BCR 3 has surged: up 177% on the route-weighted index since 1997.

+177%Since 1997
5Routes In Region
18Years

Notable Signals

long arc increasecomputed index

Willow Ptarmigan has surged in BCR 3: up 177% on the route-weighted index since 1997.

Forecast

If the recent trend holds, Willow Ptarmigan in BCR 3 is projected to fall about 64% by 2029 — from 26 in 2024 to a central estimate of 9.4 (95% range 0.00–23). A 5-year backtest shows a typical error of ±335.2%, with 40% of held-out values landing inside the 95% band.

-64%Change by 2029
9.4Projected 2029 index
0.00–2395% range
±335.2%Backtest error
19952029
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
20258.50.0022
20268.70.0022
20278.90.0023
20289.10.0023
20299.40.0023

Routes In BCR 3

Routes recording Willow Ptarmigan in BCR 3.
Red DogALASKA812024
Happy ValleyALASKA222024
UtqiagvikALASKA22023
Galbraith L.ALASKA22024
Dietrich CmpALASKA11997

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