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

Willow Ptarmigan In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestGeneralists

Willow Ptarmigan in Northern Pacific Rainforest has edged down: down 19% on the route-weighted index since 2005.

-19%Since 2005TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
5Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
14YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Willow Ptarmigan in Northern Pacific Rainforest. See the full index history below.

Routes In Northern Pacific Rainforest

Routes recording Willow Ptarmigan in Northern Pacific Rainforest.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
SkagwayALASKA42019
Thompson PasALASKA12024
Sheep MtnALASKA12006
Zimovia StrtALASKA12010
ZaremboALASKA12018

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