genus Haematopus vs bird genus

genus Haematopus and bird genus both are nouns.

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

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

genus Haematopus (noun)	bird genus (noun)
the genus of oystercatchers (Haematopus)	a genus of birds