cackler vs oscine bird

cackler and oscine bird both are nouns.

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

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

cackler: any of various insectivorous Old World birds with a loud incessant song; in some classifications considered members of the family Muscicapidae
oscine bird: passerine bird having specialized vocal apparatus

Other hypernyms of cackler include oscine.

cackler (noun)	oscine bird (noun)
a hen that has just laid an egg and emits a shrill squawk	passerine bird having specialized vocal apparatus
any of various insectivorous Old World birds with a loud incessant song; in some classifications considered members of the family Muscicapidae