genus Oenanthe vs bird genus

genus Oenanthe and bird genus both are nouns.

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

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

genus Oenanthe (noun)	bird genus (noun)
wheatears	a genus of birds
poisonous herbs: water dropworts