The Collaborative International Dictionary of English v.0.48:

Redshank \Red"shank`\ (r?d"sh?nk`), n.
   1. (Zool.)
      (a) A common Old World limicoline bird (Totanus
          calidris), having the legs and feet pale red. The
          spotted redshank (Totanus fuscus) is larger, and has
          orange-red legs. Called also redshanks, redleg,
          and clee.
      (b) The fieldfare.
          [1913 Webster]

   2. A bare-legged person; -- a contemptuous appellation
      formerly given to the Scotch Highlanders, in allusion to
      their bare legs. --Spenser.
      [1913 Webster]

WordNet (r) 3.0 (2006):

redshank
    n 1: a common Old World wading bird with long red legs [syn:
         redshank, Tringa totanus]