snowshoe hare

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A medium-sized hare (Lepus americanus) of northern North America, having large, heavily furred feet and fur that is white in winter and brown in summer.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun a North American hare, Lepus americanus, that has large, furry feet; its fur is white in winter and brown in summer

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun large large-footed North American hare; white in winter