BIOL 1902 Lecture Notes - Lecture 5: Rhizome, Cardiac Glycoside, Impatiens
6 Apr 2013
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Sub zero temperatures: 2nd problem for winter-active animals: Mobility: (the ability to move freely and easily): because of high snow, snow builds up and gets to deep to walk through. Eg: moose have very long legs- 2 m high! at the height of your shoulder. Snow shoe hares have bigger hind feet, but their tracks look like their front feet are bigger because when they jump they bring their hind(back) feet to the front. Large surface area of feet: more contact with the snow surface. Deer"s, moose, and caribous have a wide surface area on their feet. Caribou"s have short legs and huge feet. Many northern animals such as fisher also have large hind feet. Northern grouse have feet that have feathers on their feet. White-tailed deer move to a sheltered area with less snow they form yards; deer yards ; a brows line identifies a deeryard.
