Head and neck naked, bony helmet on crown. Cheek wattles. Tail of sixteen feathers. Fifth primary slightly longest. Plumage black, spotted white. Sexes similar. Eight species.
N. meleagris. 25". The Common Helmeted Guinea Fowl. Wide collar, vinous grey. Naked skin on side of face, neck, chin and wattles red, rest of neck bluish. W. Africa and Cape Verd Islands. Twelve eggs (1.95 x 1.55), pale brown, thickly pitted red-brown.
N. zechi. 18 1/2" Allied to N. meleagris, but differs in having feathers of upper parts pale brown, spotted darker. W. Africa.
N. coronata. 20". Large-helmeted Guinea Fowl. Bony helmet sloping backwards, basal part red. Naked skin on sides of head and neck pale blue. Wattle pale blue, tipped red. Feathers round base of neck banded black and white. E.S. Africa. Eggs 1.7 x 1.4.
N. reichenowi. 20 1/2" Differs from N. coronata in having helmet set vertically. Wattles crimson. E. Africa.
N. marugensis. 27". Marunga Helmeted Guinea Fowl. Naked skin on sides of head and throat flesh colour. Black and white bands of neck continued on the chest. W. Africa.
N. cornuta. 21 1/2". Damaraland Helmeted Guinea Fowl. Helmet nearly cylindrical. Naked skin of face blue. Wattles blue, tipped scarlet. W. S. Africa. Fifteen to twenty eggs, pale buff, speckled grey.
N. mitrata. 20". Helmet conical. Top of head scarlet. Naked skin on sides of head and neck blue. Wattles blue, tipped red. E. Africa. Eggs (1.9 x 1.4) pale brown, blotched and spotted pale red.
N. ptilorhyncha. 19". Abyssinian Helmeted Guinea Fowl. Bunch of pale horny bristles at base of bill. Naked skin and wattles blue. Equatorial and N. E. Africa.