This state's classification carries no date range for the species.
Absent from WY Chapter 11's species list and hunt-area tables.This species is a regulated game bird in neighboring Colorado's high alpine zones, so its complete absence from Wyoming's regulation is notable but this search could not independently confirm or deny a resident Wyoming population - flagged for follow-up rather than a confident not_present.
Higher confidence: absent from WY Chapter 11's species list (no hunting framework), and the federal Southern White-tailed Ptarmigan Species Status Assessment concludes Wyoming's historical Snowy Range population (Albany County, specimens collected 1911-1967, last documented record 2005) is presumed extirpated. No WGFD survey exists for a population no longer believed to persist in the state.