genus Himantopus vs bird genus

genus Himantopus and bird genus both are nouns.

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

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

genus Himantopus: major one of two genera of stilts; similar to avocets but with straight bills
bird genus: a genus of birds

genus Himantopus (noun)	bird genus (noun)
major one of two genera of stilts; similar to avocets but with straight bills	a genus of birds