Jan Wegener / Red-rumped Parrot (Psephotus haematonotus) male and female, Victoria, Australia

Staffan Widstrand / RF - African bush elephant, (Loxodonta africana) at night, reflected in waterhole, South Africa

John Shaw / Common giraffe (Giraffa tippelskirchi) bending to drink at a waterhole, with another standing on the opposite side of the pool reflected in the water. Klein Namutoni waterhole, Etosha National Park, N...

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) dominant male (T29) cooling off in a waterhole Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) dominant male (T29) cooling off in a waterhole Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) dominant male (T29) and resident female (T27) cooling off in a watering hole Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) dominant male (T29) and resident female (T27) cooling off in a waterhole Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) female (T27) acting cautiously as dominant male (T29) approaches watering hole Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) sub adult tigress resting at dusk. Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) dominant male approaching 'Beja pani' waterhole, Kanha National Park, Central India. Camera trap image.

Anup Shah / African elephants (Loxodonta africana) at a waterhole - remote camera. Masai Mara National Reserve, Kenya.

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) Tsavo Conservation Area, Kenya. Taken with a remote camera buggy / BeetleCam. Editorial use only. Other uses need clearance.

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) herd with calf at waterhole, seen through adults legs. Tsavo Conservation Area, Kenya. Taken with a remote camera buggy / BeetleCam. Edit...

Ann & Steve Toon / Giraffe (Giraffa camelopardalis) drinking at night, Zimanga private game reserve, KwaZulu-Natal, South Africa August

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

Jurgen 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. Taken with a remote camera buggy / BeetleCam. Editorial use only. Other uses need clea...

Sergey Gorshkov / Leopard (Panthera pardus) walking beside waterhole, reflected in the water at dusk. Londolozi Private Game Reserve, Sabi Sands Game Reserve, South Africa.

Cyril Ruoso / Feral Horses (Equus caballus) gathering around waterhole, Namib-Naukluft National Park, Namibia.

Bence Mate / African buffalo (Syncerus caffer) at waterhole at night, Mkuze, South Africa Third place in the Nature Portfolio category of the World Press Photo Awards 2017.

Bence Mate / Hippopotamus (Hippopotamus amphibius) at waterhole at night, Mkuze, South Africa Third place in the Nature Portfolio category of the World Press Photo Awards 2017.

Bence Mate / African elephant (Loxodonta africana) at waterhole at night, Mkuze, South Africa Third place in the Nature Portfolio category of the World Press Photo Awards 2017.

Bence Mate / African lion (Panthera leo) at waterhole at night, Mkuze, South Africa Third place in the Nature Portfolio category of the World Press Photo Awards 2017.

Bence Mate / Zebra at waterhole at night, Mkuze, South Africa Third place in the Nature Portfolio category of the World Press Photo Awards 2017.

Bence Mate / African elephant (Loxodonta africana) and Zebra (Equus quagga) at waterhole at night, Mkuze, South Africa Third place in the Nature Portfolio category of the World Press Photo Awards 2017.

Bence Mate / African buffalo (Syncerus caffer) at waterhole at night, Mkuze, South Africa Third place in the Nature Portfolio category of the World Press Photo Awards 2017.

Ann & Steve Toon / White rhino (Ceratotherium simum) at waterhole at night, Zimanga Private Game Reserve, KwaZulu-Natal, South Africa.

Ann & Steve Toon / White rhino (Ceratotherium simum) at waterhole drinking at night, Zimanga Private Game Reserve, KwaZulu-Natal, South Africa.

Ann & Steve Toon / Elephants (Loxodonta africana) at waterhole drinking at night. One spraying water from trunk, Zimanga Private Game Reserve, KwaZulu-Natal, South Africa.

Ann & Steve Toon / Elephants (Loxodonta africana) at waterhole drinking at night, Zimanga Private Game Reserve, KwaZulu-Natal, South Africa.

Ann & Steve Toon / Common wildebeest (Connochaetes taurinus) with reflection at waterhole, Zimanga private game reserve, KwaZulu-Natal, South Africa, September

Ann & Steve Toon / Cape buffalo (Syncerus caffer) at waterhole at night with plains zebra (Equus quagga), Zimanga private game reserve, KwaZulu-Natal, South Africa, September

Ann & Steve Toon / Cape buffalo (Syncerus caffer) drinking at waterhole at night, Zimanga private game reserve, KwaZulu-Natal, South Africa, September

Ann & Steve Toon / Cape buffalo (Syncerus caffer) drinking at waterhole at night, Zimanga private game reserve, KwaZulu-Natal, South Africa, September

Ann & Steve Toon / Plains zebra (Equus quagga) drinking at waterhole at night, Zimanga private game reserve, KwaZulu-Natal, South Africa, September

Neil Aldridge / Warthog (Phacochoerus africanus) with a Yellow-billed oxpecker (Buphagus africanus) on its back, nuzzling its mother at a waterhole, Chief's Island, Okavango Delta, Botswana.

Neil Aldridge / African elephants (Loxodonta africana) herd approaching a waterhole on Northern Tuli Game Reserve, Botswana. Vulnerable species.

Neil Aldridge / African elephants (Loxodonta africana) drinking in low evening light at a waterhole, Chobe District, Botswana. Vulnerable species.

Wim van den Heever / African elephants (Loxodonta africana) small herd at waterhole at sunset, Etosha National Park, Namibia

Wim van den Heever / African elephant (Loxodonta africana) three big bull elephants spending the late afternoon at waterhole, Ol'Donyo Kenya.

Wim van den Heever / Black rhinoceros (Diceros bicornis) mother and calf having a drink at night with perfect reflections. Etosha National Park, Namibia. Taken with infrared camera.

Wim van den Heever / Black rhinoceros (Diceros bicornis) bull having a drink at night with perfect reflections. Etosha National Park, Namibia. Taken with Infrared camera.

Wim van den Heever / Springbok (Antidorcas marsupialis) herd reflected in waterhole. Etosha National Park, Namibia, June.

Eric Baccega / African elephant (Loxodonta africana) herd with calves, walking in procession to a waterhole in sand storm, Etosha National Park, Namibia, Africa

Eric Baccega / African elephant (Loxodonta africana) and black rhinoceros (Diceros bicornis) bathing at waterhole at night with moon, Okaukuejo, Etosha National Park, Namibia, Africa. Taken with infrared camera.

Eric Baccega / Angolan giraffes (Giraffa camelopardalis angolensis) and black rhinoceros (Diceros bicornis) reflecting in waterhole at sunset, Okaukuejo, Etosha National Park, Namibia, Africa

Ann & Steve Toon / Banded mongoose (Mungos mungo) drinking, Zimanga Private Game Reserve, KwaZulu-Natal, South Africa, May

Klein & Hubert / African elephants (Loxodonta africana) with calves drinking at waterhole, Botswana.

Klein & Hubert / African elephant (Loxodonta africana) bull drinking at waterhole, Botswana.