quagga vs Equus quagga

quagga and Equus quagga both are nouns.

Word	Noun	Adjective	Verb	Adverb
quagga	Yes	No	No	No
Equus quagga	Yes	No	No	No

As nouns, quagga and Equus quagga are synonyms defined as:

quagga and Equus quagga: mammal of South Africa that resembled a zebra; extinct since late 19th century

quagga (noun)	Equus quagga (noun)
mammal of South Africa that resembled a zebra; extinct since late 19th century	mammal of South Africa that resembled a zebra; extinct since late 19th century