Source : Webster's Revised Unabridged Dictionary (1913)

Tidy \Ti"dy\, n. (Zo["o]l.)
   The wren; -- called also {tiddy}. [Prov. Eng.]

         The tidy for her notes as delicate as they. --Drayton.

   Note: This name is probably applied also to other small
         singing birds, as the goldcrest.