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 elephant (Loxodonta africana) having a bath at a water hole, Tsavo East National Park, Kenya. August.

Denis-Huot / Warthog (Phaecochoerus aethiopicus) male lying in a muddy puddle, Nairobi National Park, Kenya. April.

Denis-Huot / Hippopotamus (Hippopotamus amphibius) male covered in mud, Masai-Mara Game Reserve, Kenya. March.

Denis-Huot / Male African buffalo (Syncerus caffer) having a mud bath, flinging mud, Meru National Park, Kenya. May.

Axel Gomille / Asian elephant (Elephas maximus), wild male taking mud-bath, Nagarhole National Park, South India.

Anup Shah / African elephants wallowing and playing in mud at a dried up waterhole (Loxodonta africana). Maasai Mara National Reserve, Kenya. Feb 2012.

Anup Shah / African elephants (Loxodonta africana) wallowing and playing in mud at a dried up waterhole. Maasai Mara National Reserve, Kenya. Feb 2012.

Anup Shah / African elephant (Loxodonta africana) juvenile covered in mud after wallowing. Maasai Mara National Reserve, Kenya. Feb 2012.

Roland Seitre / Sumatran rhinoceros (Dicerorhinus sumatrensis) female mud bathing at captive breeding facility at Cincinati Zoo, USA. Native to Sumatra, Borneo and the Malay Penninsula. Critically endangered species...

Lou Coetzer / Bull African elephant (Loxodonta africana) mud bathing, Chobe River, Botswana, November, Vulnerable species.

Michele Westmorland / Galapagos giant tortoises (Chelonoidis nigra) taking mud bath, Galapagos Islands. Vulnerable species.