The Collaborative International Dictionary of English v.0.48:

Murre \Murre\, n. (Zool.)
   Any one of several species of sea birds of the genus Uria,
   or Catarractes; a guillemot.
   [1913 Webster]

   Note: The murres are allied to the auks, and are abundant on
         the northern coasts of Europe and America. They often
         breed in large communities on the projecting ledges of
         precipituous cliffs, laying one or two large eggs on
         the bare rocks.
         [1913 Webster]

WordNet (r) 3.0 (2006):

murre
    n 1: black-and-white diving bird of northern seas