The Collaborative International Dictionary of English v.0.48:

Yarwhip \Yar"whip`\, n. [So called from its sharp cry uttered
   when taking wing.] (Zool.)
   The European bar-tailed godwit; -- called also yardkeep,
   and yarwhelp. See Godwit. [Prov. Eng.]
   [1913 Webster]