Serinus canaria vs canary bird

Serinus canaria and canary bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
Serinus canaria	Yes	No	No	No
canary bird	Yes	No	No	No

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

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

Other hypernyms of Serinus canaria include canary.

Serinus canaria (noun)	canary bird (noun)
native to the Canary Islands and Azores; popular usually yellow cage bird noted for its song	any of several small Old World finches