Source : Webster's Revised Unabridged Dictionary (1913)

Canary bird \Ca*na"ry bird`\ (Zo["o]l.)
   A small singing bird of the Finch family ({Serinus
   Canarius}), a native of the Canary Islands. It was brought to
   Europe in the 16th century, and made a household pet. It
   generally has a yellowish body with the wings and tail
   greenish, but in its wild state it is more frequently of gray
   or brown color. It is sometimes called {canary finch}.

Source : WordNet®

canary bird
     n : any of several small Old World finches [syn: {canary}]