Coloration evidence for natural selection J. Bowler wrote that Darwin's theory In his 1889 book "Darwinism", the naturalist Alfred Russel Wallace considered the white coloration of Arctic animals. He recorded that the Arctic fox, Arctic hare, ermine and ptarmigan change their colour seasonally, and gave "the obvious explanation", that it was for concealment. The modern ornithologist W. L. N. Tickell, reviewing proposed explanations of white plumage in birds, writes that in the ptarmigan "it is difficult to escape the conclusion that cryptic brown summer plumage becomes a liability in snow, and white plumage is therefore another cryptic adaptation." All the same, he notes, "in spite
2008 Arctic Winter Games 2008 Arctic Winter Games Approximately 2,000 athletes, coaches, team staff and officials participated in the 2008 Arctic Winter Games in Yellowknife, Northwest Territories in Canada, celebrating the 20th event. The 2008 games took place from March 9 through March 15. Events were held in and around the city of Yellowknife. This was the fourth time Yellowknife had hosted the games, and the fifth time overall in the Northwest Territories. The 2010 Games will be held in Grande Prairie, Alberta. Competition was held in alpine skiing, badminton, basketball, biathlon, cross-country skiing, curling, Dene games (see Dene), dog mushing, figure skating, gymnastics,