flying cat vs Petaurista petaurista

flying cat and Petaurista petaurista both are nouns.

Word	Noun	Adjective	Verb	Adverb
flying cat	Yes	No	No	No
Petaurista petaurista	Yes	No	No	No

As nouns, flying cat and Petaurista petaurista are synonyms defined as:

Other synonyms of flying cat include flying marmot, taguan.

flying cat (noun)	Petaurista petaurista (noun)
East Indian flying squirrel	East Indian flying squirrel
arboreal nocturnal mammal of southeast Asia and the Philippines resembling a lemur and having a fold of skin on each side from neck to tail that is used for long gliding leaps