Source : Webster's Revised Unabridged Dictionary (1913)

Blackcap \Black"cap`\ (-k[a^]p`), n.
   1. (Zo["o]l.)
      (a) A small European song bird ({Sylvia atricapilla}),
          with a black crown; the mock nightingale.
      (b) An American titmouse ({Parus atricapillus}); the
          chickadee.