parrot vs African gray

parrot and African gray both are nouns.

As nouns, African gray is a hyponym of parrot; that is, African gray is a word with a more specific, narrower meaning than parrot:

parrot: usually brightly colored zygodactyl tropical birds with short hooked beaks and the ability to mimic sounds
African gray: commonly domesticated grey parrot with red-and-black tail and white face; native to equatorial Africa

Other hyponyms of parrot include popinjay, poll, poll parrot, Psittacus erithacus, African grey, amazon, macaw, Nestor notabilis, kea, cockatoo, Nymphicus hollandicus, cockateel, cockatiel, cockatoo parrot, lovebird, lory, parakeet, paraquet, paroquet, parrakeet, parroket, parroquet.

parrot (noun)	African gray (noun)
usually brightly colored zygodactyl tropical birds with short hooked beaks and the ability to mimic sounds	commonly domesticated grey parrot with red-and-black tail and white face; native to equatorial Africa
a copycat who does not understand the words or acts being imitated

parrot (verb)	African gray (verb)
repeat mindlessly