Elanus vs bird genus

Elanus and bird genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Elanus	Yes	No	No	No
bird genus	Yes	No	No	No

As nouns, bird genus is a hypernym of Elanus; that is, bird genus is a word with a broader meaning than Elanus:

Elanus (noun)	bird genus (noun)
a genus of small kites of both Old and New Worlds	a genus of birds