Cygnus vs bird genus

Cygnus and bird genus both are nouns.

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

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

Cygnus (noun)	bird genus (noun)
a genus of Anatidae, containing the swans (Cygnus)	a genus of birds
a constellation in the Northern Hemisphere between Pegasus and Draco in the Milky Way; contains a black hole