\Sun"bird`\, n. (Zo["o]l.)
(a) Any one of numerous species of small brilliantly colored
    birds of the family {Nectariniid[ae]}, native of Africa,
    Southern Asia, the East Indies, and Australia. In
    external appearance and habits they somewhat resemble
    humming birds, but they are true singing birds (Oscines).
(b) The sun bittern.