genus Timalia vs bird genus

genus Timalia and bird genus both are nouns.

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

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

genus Timalia (noun)	bird genus (noun)
type genus of the Timaliidae	a genus of birds