The Collaborative International Dictionary of English v.0.48:

Wedge-tailed \Wedge"-tailed"\, a. (Zool.)
   Having a tail which has the middle pair of feathers longest,
   the rest successively and decidedly shorter, and all more or
   less attenuate; -- said of certain birds. See Illust. of
   Wood hoopoe, under Wood.
   [1913 Webster]

   Wedge-tailed eagle, an Australian eagle (Aquila audax)
      which feeds on various small species of kangaroos, and on
      lambs; -- called also mountain eagle, bold eagle, and
      eagle hawk.

   Wedge-tailed gull, an arctic gull (Rhodostethia rosea) in
      which the plumage is tinged with rose; -- called also
      Ross's gull.
      [1913 Webster]