Lynx rufa

from The Collaborative International Dictionary of English v.0.48

Bay \Bay\ (b[=a]), a. [F. bai, fr. L. badius brown,
   chestnut-colored; -- used only of horses.]
   Reddish brown; of the color of a chestnut; -- applied to the
   color of horses.
   [1913 Webster]

   {Bay cat} (Zool.), a wild cat of Africa and the East Indies
      ({Felis aurata}).

   {Bay lynx} (Zool.), the common American lynx ({Lynx lynx},
      formerly {Felis rufa} or {Lynx rufa}).
      [1913 Webster]