The Collaborative International Dictionary of English v.0.48:

Dunlin \Dun"lin\, n. [Prob. of Celtic origin; cf. Gael. dun hill
   (E. dune), and linne pool, pond, lake, E. lin.] (Zool.)
   A species of sandpiper (Tringa alpina); -- called also
   churr, dorbie, grass bird, and red-backed sandpiper.
   It is found both in Europe and America.
   [1913 Webster]

WordNet (r) 3.0 (2006):

red-backed sandpiper
    n 1: small common sandpiper that breeds in northern or Arctic
         regions and winters in southern United States or
         Mediterranean regions [syn: red-backed sandpiper,
         dunlin, Erolia alpina]