Source : Webster's Revised Unabridged Dictionary (1913)

Water hare \Wa"ter hare\ (Zo["o]l.)
   A small American hare or rabbit ({Lepus aquaticus}) found on
   or near the southern coasts of the United States; -- called
   also {water rabbit}, and {swamp hare}.

Source : WordNet®

swamp hare
     n : of southeastern United States swamps and lowlands [syn: {swamp
         rabbit}, {canecutter}, {Sylvilagus aquaticus}]