Snow camouflage as Hugh B. Cott have echoed his observations, adding that other animals of the Arctic such as musk ox, moose, reindeer, wolverine and raven never become white "even in the coldest parts of their range". Cott noted that both animals that hunt, like polar bear and stoat, and prey animals like ptarmigan and mountain hare, require camouflage to hide from prey or from predators respectively. There is little experimental evidence for the adaptiveness of white as camouflage, though the ornithologist W. L. N. Tickell, reviewing proposed explanations of white plumage in birds, writes that in the ptarmigan "it is difficult
Ptarmigan (sternwheeler) "Gian" was at least theoretically faster than "Ptarmigan" made several challenges to Armstrong to race. There is a story that one day in late August 1906 Cantlie was out in his launch in the river at the same time as "Ptarmigan". Cantle seized the moment and sped past "Ptarmigan" with his bagpiper blasting out airs as "Gian" sped past. This was too much for Captain Armstrong, a master steamboat man and veteran of the Klondike Gold Rush. Armstrong ordered full steam ahead, and when "Ptarmigan" caught up to "Gian", two or three roustabouts reached over to "Gian", seized the still-playing