Mimus polyglotktos vs oscine

Mimus polyglotktos and oscine both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mimus polyglotktos	Yes	No	No	No
oscine	Yes	Yes	No	No

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

Mimus polyglotktos: long-tailed grey-and-white songbird of the southern United States able to mimic songs of other birds
oscine: passerine bird having specialized vocal apparatus

Other hypernyms of Mimus polyglotktos include oscine bird.

Mimus polyglotktos (noun)	oscine (noun)
long-tailed grey-and-white songbird of the southern United States able to mimic songs of other birds	passerine bird having specialized vocal apparatus

Mimus polyglotktos (adjective)	oscine (adjective)
	of or relating to the songbirds