White-tailed Ptarmigan (Lagopus leucura) [XC39095]
by Edward R. Manners from Mount Fremont Trail, Sunrise, Mount Rainier National Park, Pierce County, Washington, United States (hen clucking, male flight scream)
White-tailed Ptarmigan (Lagopus leucura) [XC110506]
by Frank Lambert from Upper Yentna Glacier, Alaska, United States (call)
Subspecies
Validity of subspecies questionable. All may be invalid.
The following 5 subspecies are recognised:
peninsularis Chapman, 1902 - Mountains in Alaska, Yukon and Mackenzie, south to Kenai Peninsula and southern Yukon.
leucura (Richardson, 1831) - Northern Yukon, western Br. Columbia and western Alberta to northern border of US.