Suzi Eszterhas / African Wild Dog (Lycaon pictus) pack attacking Warthog (Phacochoerus africanus), northern Botswana

Mitsuaki Iwago / Warthog (Phacochoerus africanus) portrait, Serengeti National Park, Tanzania

Ann & Steve Toon / Warthog (Phacochoerus africanus) with Redbilled oxpecker (Buphagus erythrorhynchus), Zimanga game reserve, KwaZulu-Natal, South Africa.

Ann & Steve Toon / Warthog (Phacochoerus africanus) drinking, with redbilled oxpeckers (Buphagus erythrorhynchus), Zimanga game reserve, KwaZulu-Natal, South Africa.

Ann & Steve Toon / Warthog (Phacochoerus africanus) drinking, with redbilled oxpecker (Buphagus erythrorhynchus), Zimanga game reserve, KwaZulu-Natal, South Africa.

Ann & Steve Toon / Warthog (Phacochoerus africanus) sounder on the move, Zimanga game reserve, KwaZulu-Natal, South Africa.

Ann & Steve Toon / Redbilled oxpecker (Buphagus erythrorhynchus) searching for insects on Warthog (Phacochoerus africanus), Zimanga game reserve, KwaZulu-Natal, South Africa.

Yashpal Rathore / African elephant (Loxodonta africana) and Warthog (Phacochoerus africanus) waiting near waterhole. Savuti, Chobe National Park, Botswana.

Staffan Widstrand / Common Warthog (Phacochoerus africanus) portrait, Zimanga Private Nature Reserve, KwaZulu Natal, South Africa

Staffan Widstrand / Common Warthog (Phacochoerus africanus), with a Red-billed Oxpecker (Buphagus erythrorhynchus) eating its ticks and other parasites, Zimanga Private Nature Reserve, KwaZulu Natal, South Africa

Staffan Widstrand / Common Warthog (Phacochoerus africanus) close up of eye and 'warts' Zimanga Private Nature Reserve, KwaZulu Natal, South Africa

Staffan Widstrand / Common Warthog (Phacochoerus africanus), with an African / Cape Buffalo in the foreground, Zimanga Private Nature Reserve, KwaZulu Natal, South Africa