European cuckoo vs Cuculus canorus

European cuckoo and Cuculus canorus both are nouns.

Word	Noun	Adjective	Verb	Adverb
European cuckoo	Yes	No	No	No
Cuculus canorus	Yes	No	No	No

As nouns, European cuckoo and Cuculus canorus are synonyms defined as:

European cuckoo and Cuculus canorus: common cuckoo of Europe having a distinctive two-note call; lays eggs in the nests of other birds

European cuckoo (noun)	Cuculus canorus (noun)
common cuckoo of Europe having a distinctive two-note call; lays eggs in the nests of other birds	common cuckoo of Europe having a distinctive two-note call; lays eggs in the nests of other birds