Source : Webster's Revised Unabridged Dictionary (1913)

Redstart \Red"start`\ (-st?rt`), n. [Red + start tail.]
   (Zo["o]l.)
   (a) A small, handsome European singing bird ({Ruticilla
       ph[oe]nicurus}), allied to the nightingale; -- called
       also {redtail}, {brantail}, {fireflirt}, {firetail}. The
       black redstart is {P.tithys}. The name is also applied to
       several other species of {Ruticilla} amnd allied genera,
       native of India.
   (b) An American fly-catching warbler ({Setophaga ruticilla}).
       The male is black, with large patches of orange-red on
       the sides, wings, and tail. The female is olive, with
       yellow patches.

Firetail \Fire"tail`\, n. (Zo["o]l.)
   The European redstart; -- called also {fireflirt}. [prov.
   Eng.]