Haliaeetus vs bird genus

Haliaeetus and bird genus both are nouns.

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

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

Haliaeetus (noun)	bird genus (noun)
a genus of Accipitridae, containing the sea eagles (Haliaeetus)	a genus of birds