The Collaborative International Dictionary of English v.0.48:

Sanderling \San"der*ling\, n. [Sand + -ling. So called because
   it obtains its food by searching the moist sands of the
   seashore.] (Zool.)
   A small gray and brown sandpiper (Calidris arenaria) very
   common on sandy beaches in America, Europe, and Asia. Called
   also curwillet, sand lark, stint, and ruddy plover.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sanderling
    n 1: small sandpiper that breeds in the Arctic and migrates
         southward along sandy coasts in most of world [syn:
         sanderling, Crocethia alba]