bowerbird vs oscine bird

bowerbird and oscine bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
bowerbird	Yes	No	No	No
oscine bird	Yes	No	No	No

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

bowerbird: any of various birds of the Australian region whose males build ornamented structures resembling bowers in order to attract females
oscine bird: passerine bird having specialized vocal apparatus

Other hypernyms of bowerbird include oscine.

bowerbird (noun)	oscine bird (noun)
any of various birds of the Australian region whose males build ornamented structures resembling bowers in order to attract females	passerine bird having specialized vocal apparatus