Juergen & Christine Sohns / African Elephant (Loxodonta africana) calf drinking at waterhole, Addo National Park, South Africa

Marion Vollborn/ BIA / African Lion (Panthera leo) cubs drinking at waterhole, Okavango Delta, Botswana

Jami Tarris / Bengal Tiger (Panthera tigris tigris) in waterhole, Ranthambore National Park, India

Yva Momatiuk & John Eastcott / Warthog (Phacochoerus africanus) male at waterhole in dry season, Etosha National Park, Namibia

Yva Momatiuk & John Eastcott / Ostrich (Struthio camelus) sub-adults at waterhole in dry season, Etosha National Park, Namibia

Richard Du Toit / African Elephant (Loxodonta africana) bulls drinking, Shingwedzi River, Kruger National Park, South Africa

Denis-Huot / Aerial view of Elephants (Loxodonta africana) at watering hole in the rainy season, Tsavo East National Park, Kenya.

Theo Allofs / Burchell's Zebra (Equus burchellii) pair drinking at waterhole with Oryx (Oryx gazella) in background, NamibRand Nature Reserve, Namibia

Theo Allofs / Oryx (Oryx gazella) group drinking at waterhole, NamibRand Nature Reserve, Namibia

Vincent Grafhorst / African Elephant (Loxodonta africana) pair of bulls at water hole, Nxai Pan National Park, Botswana

Denis-Huot / African buffalo (Syncerus caffer) herd drinking in front of Voi lodge, aerial view, Tsavo East National Park, Kenya

Anup Shah / Forest elephant herd (Loxodonta cyclotis) drinking and wallowing in a river, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic