common canary vs canary

common canary and canary both are nouns.

Word	Noun	Adjective	Verb	Adverb
common canary	Yes	No	No	No
canary	Yes	Yes	No	No

As nouns, canary is a hypernym of common canary; that is, canary is a word with a broader meaning than common canary:

common canary: native to the Canary Islands and Azores; popular usually yellow cage bird noted for its song
canary: any of several small Old World finches

Other hypernyms of common canary include canary bird.

common canary (noun)	canary (noun)
native to the Canary Islands and Azores; popular usually yellow cage bird noted for its song	any of several small Old World finches
	a moderate yellow with a greenish tinge
	a female singer
	someone acting as an informer or decoy for the police

common canary (adjective)	canary (adjective)
	having the color of a canary; of a light to moderate yellow