Denis-Huot / African elephant (Loxodonta africana) having a mud bath at a water hole, Tsavo East National Park, Kenya. August.

Denis-Huot / Hippo (Hippopotamus amphibius) male after a a mud bath, Masai-Mara Game Reserve, Kenya. Vulnerable species.

Denis-Huot,Denis-Huot / Hippopotamus (Hippopotamus amphibius) males in a muddy pond, aerial view, Rwindi national park, Democratic Republic of Congo. Vulnerable species.

Denis-Huot / African buffalo (Syncerus caffer) male covered with mud after mud bathing, Nakuru National Park, Kenya

Mark Carwardine / Stephen Fry and Mark Carwadine after a mud bath in Borneo, filming for BBC TV series 'Last Chance to See', March 2009

Christophe Courteau / African Buffalo {Sincerus caffer} bull taking a mud bath, Okavango Delta, Botswana.

Gerry Ellis / African Elephant (Loxodonta africana) orphaned baby Mwega playing at mud bath, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

Gerry Ellis / African Elephant (Loxodonta africana) orphan called Isholta, five weeks old, playing in mud bath, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

Gerry Ellis / African Elephant (Loxodonta africana) orphans heading out to mud bath, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

Gerry Ellis / African Elephant (Loxodonta africana) orphan called Natumi, charging and playing in mud bath, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

Gerry Ellis / African Elephant (Loxodonta africana) orphans, Nyiro and Lewa in mud bath, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

Danny Green / Red Deer (Cervus elaphus) stag after a mud bath, Bradgate Park, Leicestershire, UK, October.