Cape buffalo (Syncerus caffer), Kruger National Park, South Africa, Africa

White rhino (Ceratotherium simum) with muddy face, Mkhuze game reserve, KwaZulu-Natal, South Africa, Africa

Portrait of a Worship man with a muddy face during Loei Peetakhon festival in Thailand, Southeast Asia, Asia

Young Thomsons Gazelle stuck in the mud of a drying river bed, Grumeti area, Tanzania

Young Thomsons Gazelle stuck in the mud of a drying river bed, Grumeti area, Tanzania

Crocodile in muddy shallows of the Mossman River, Daintree, Australia

Crocodile in muddy shallows of the Mossman River, Daintree, Australia

Afghan boy in front of a stove

Woman having skincare treatment

African Bush Elephant or Savanna Elephant (Loxodonta africana), Moremi Game Reserve, Botswana, Africa

Close-up of a common warthog (Phacochoerus africanus) lying on its stomach in the mud at a waterhole next to a butterfly at the Gabus Game Ranch; Otavi, Otjozondjupa, Namibia

Portrait of a common warthog (Phacochoerus africanus) standing in the mud at a waterhole and looking at the camera at the Gabus Game Ranch; Otavi, Otjozondjupa, Namibia

Close-up of an African bush elephant (Loxodonta africana) drinking from grassy waterhole with its trunk curled into its mouth on the savanna in Etosha National Park; Otavi, Oshikoto, Namibia

Close-up of an African bush elephant (Loxodonta africana) drinking from grassy waterhole with its trunk curled into its mouth on the savanna in Etosha National Park; Otavi, Oshikoto, Namibia

Two common warthogs (Phacochoerus africanus) lying in a muddy waterhole on the stony ground on the savanna at the Gabus Game Ranch; Otavi, Otjozondjupa, Namibia