
• 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.
Found on
http://thinkexist.com/dictionary/meaning/canary_bird/
Ca·na'ry bird` (Zoology) 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 br...
Found on
http://www.encyclo.co.uk/webster/C/14

Canary-bird was old British slang for a convict.
Found on
http://www.probertencyclopaedia.com/browse/ZC.HTM
No exact match found.