The Collaborative International Dictionary of English v.0.48:

Taring \Tar"ing\, n. (Zool.)
   The common tern; -- called also tarret, and tarrock.
   [Prov. Eng.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tarrock \Tar"rock\, n. [Greenland tattarock.] (Zool.)
   (a) The young of the kittiwake gull before the first molt.
   (b) The common guillemot. [Prov. Eng.]
   (c) The common tern.
       [1913 Webster]