A guinea fowl is a large grey African bird that is often eaten as food.
guinea fowl in British English
or guinea
noun
any gallinaceous bird, esp Numida meleagris, of the family Numididae of Africa and SW Asia, having a dark plumage mottled with white, a naked head and neck, and a heavy rounded body
guinea fowl in American English
any of a family (Numididae) of gallinaceous African birds with a featherless head,rounded body, and dark feathers spotted with white, esp. the widespread domesticated species (Numida meleagris)