Numenius arquata vs curlew

Numenius arquata and curlew both are nouns.

Word	Noun	Adjective	Verb	Adverb
Numenius arquata	Yes	No	No	No
curlew	Yes	No	No	No

As nouns, curlew is a hypernym of Numenius arquata; that is, curlew is a word with a broader meaning than Numenius arquata:

Numenius arquata: common Eurasian curlew
curlew: large migratory shorebirds of the sandpiper family; closely related to woodcocks but having a down-curved bill

Numenius arquata (noun)	curlew (noun)
common Eurasian curlew	large migratory shorebirds of the sandpiper family; closely related to woodcocks but having a down-curved bill