White-tailed ptarmigan cover. The white-tailed ptarmigan was introduced into the Sierra Nevada of California, Wallowa Mountains in Oregon, and Uinta Mountains of Utah in the 1970s. It may have been native here during the early Pleistocene but became locally extinct due to climate changes with greater snow-cover in spring impacting on its breeding season. Alternatively, it may have been unable to colonize the Sierra Nevada because of the barriers provided by the Columbia River and the Great Basin, and the low altitudes of the intervening South Cascades. This herbivorous bird's diet varies seasonally. Nitrogen-rich snow buttercup leaves are favored in the spring
Arctic Winter Games the first Arctic Winter Games. The participants came from the Northwest Territories, Yukon and Alaska. Since then, the Games have been held on fifteen occasions in different places and with ever more participants from more and more places within the Arctic region. The games in 2002 were the first jointly hosted Arctic Winter Games, by Nuuk, Greenland and Iqaluit, Nunavut. Games include: A total of nine contingents participated in the Arctic Winter Games. The same group of teams also made up the participants of the previous games Host cities have mostly been in Canada and the United States. The Hodgson