Colin Varndell / Hornet (Vespa crabro) drinking at bird bath. Dorset, UK, July.

Suzi Eszterhas / Cape Warthog (Phacochoerus aethiopicus) parent and juvenile drinking at waterhole, Mashatu Game Reserve, Botswana

Piotr Naskrecki / Dobson's Pipistrelle (Pipistrellus grandidieri) pair drinking, Gorongosa National Park, Mozambique

Piotr Naskrecki / Butterfly Bat (Glauconycteris variegata) drinking, Gorongosa National Park, Mozambique

Piotr Naskrecki / Decken's Horseshoe Bat (Rhinolophus deckenii) drinking, Gorongosa National Park, Mozambique

Juergen Freund / Australian freshwater crocodiles (Crocodylus johnsoni) catching a Little red flying fox (Pteropus scapulatus) flying to drink from a watering hole, Kimberley, Western Australia.

Juergen Freund / Australian freshwater crocodiles (Crocodylus johnsoni) trying to catch Little red flying foxes (Pteropus scapulatus) flying to drink from a watering hole, Kimberley, Western Australia

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) herd at waterhole, Tsavo Conservation Area, Kenya. Editorial use only.

Winfried Wisniewski / Warthog (Phacochoerus africanus) drinking at waterhole, KwaZulu-Natal, South Africa

Winfried Wisniewski / Cape Buffalo (Syncerus caffer) drinking at waterhole at night, KwaZulu-Natal, South Africa

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