Source : Webster's Revised Unabridged Dictionary (1913)

Varying \Va"ry*ing\,
   a. & n. from {Vary}.

   {Varying hare} (Zo["o]l.), any hare or rabbit which becomes
      white in winter, especially the common hare of the
      Northern United States and Canada.

Source : WordNet®

varying hare
     n : large large-footed North American hare; white in winter
         [syn: {snowshoe hare}, {snowshoe rabbit}, {Lepus
         americanus}]