Winter, Snow, Ice, Camouflage, Ptarmigan, Willow Ptarmigan, Lagopus lagopus, Denali National Park, Alaska, Bird, Birds, Birding, Animal, Biologist, Conservation, Ecology, Endangered, Environment, Forest, Habitat, Hunt, Hunter, Natural, National Park, Nature, Photo, Photographer, Research, Resources, Safari, Sanctuary, Wilderness, Wildlife, Animals, National Park, National Park Service, National Monument, National Recreation Area, National Wildlife Refuge