Two red-billed oxpecker (Buphagus erythrorhynchus) on an impala, Kruger National Park, South Africa, Africa

Cape buffalo (African buffalo) (Syncerus caffer) and two yellow-billed oxpeckers (Buphagus africanus), Ngorongoro Crater, Tanzania, East Africa, Africa

Two adult and an immature red-billed oxpecker (Buphagus erythrorhynchus) on an impala, Kruger National Park, South Africa, Africa

Male impala (Aepyceros melampus) with two red-billed oxpeckers (Buphagus erythrorhynchus), Kruger National Park, South Africa, Africa

Two Rhinos and an oxpecker bird in the Amakhala Game Reserve in the Eastern Cape, South Africa, Africa

Roan antelope and two oxpeckers, Busanga Plains, Kafue National Park, Zambia, Africa

Two yellow-billed oxpecker (Buphagus africanus) clinging to Masai giraffe (Giraffa camelopardalis tippelskirchii), Serengeti National Park, Tanzania

Two yellow-billed oxpeckers (Buphagus africanus) in Cape buffalo (Syncerus caffer) nostrils, Klein's Camp, Serengeti National Park; Tanzania

Two buffalo, Syncerus caffer, wallow and lie in the water, eyes closed, red-billed oxpeckers sit on them, Buphagus erythrorhynchus, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

A male and female southern African giraffe's heads, Giraffa camelopardalis giraffa, and two birds, Red-billed oxpeckers, Buphagus erythrorhynchus, perched on the animals' skin, Londolozi Game Reserve, Kruger National Park, Sabi Sands, South Africa

Red-billed Oxpeckers (Buphagus erythrorhynchus) is sitting on the giraffe's skin. Serengeti National Park. Kenya. Tanzania.

Female giraffe (Giraffa camelopardalis tippelskirchi) with a baby in savannah. Kenya. Tanzania. East Africa.

Female giraffe (Giraffa camelopardalis tippelskirchi) with a baby in the savannah. Kenya. Tanzania. East Africa.

African buffalo lying in the plain, Chobe Botswana