Shin Yoshino / Yellow-billed Oxpecker (Buphagus africanus) trio sitting on Cape Buffalo's (Syncerus caffer) head, Kenya

Ingo Arndt / Cape Buffalo (Syncerus caffer) portrait, Masai Mara National Reserve, Kenya

Yva Momatiuk & John Eastcott / Cape Buffalo (Syncerus caffer) bull with Red-billed Oxpecker (Buphagus erythrorhynchus) feeding on ticks and insects, Masai Mara National Reserve, Kenya

Yva Momatiuk & John Eastcott / Cape Buffalo (Syncerus caffer) with Red-billed Oxpeckers (Buphogus erythrorhymchus) on its nose and head, Lake Nakuru National Park, Kenya