Ogilby's duiker
 Ogilby's duiker (Cephalophus ogilbyi) is a small antelope found in Sierra Leone Liberia Ghana southeastern Nigeria Equatorial Guinea's Bioko Island and possibly Gabon. No subspecies are recognized.The two former subspecies the white-legged duiker Cephalophus crusalbum and the Brooke's duiker Cephalophus brookei are considered as distinct species since 2011.Ogilby's duikers weigh up to 20 kg (44 lb) and have a shoulder height of up to 56 cm (22 in).