Both species have a white ventrum, a crest, mane, and beard. Drills have a white beard, mandrills a yellow beard. Both species have a long muzzle and bony paranasal swellings. Drills have a black face and smooth paranasal swellings.
Both species have a white ventrum, a crest, mane, and beard. Drills have a white beard, mandrills a yellow beard. Both species have a long muzzle and bony paranasal swellings. Drills have a black face and smooth paranasal swellings. - google
