Wild Wonders of Europe / Benvie / Mountain houseleek (Sempervivum montanum) close-up of two flowers, Fliess, Naturpark Kaunergrat, Tirol, Austria, July 2008 WWE OUTDOOR EXHIBITION.

Tony Heald / Asian elephant (Elephas maximus) domesticated elephant working, picking reeds, Kaziranga National Park, Assam, India, March 2009.

Anup Shah / Young African elephant holding plant with trunk, Masai Mara, Kenya

Sean Viljoen / African elephant (Loxodonta africana) feeding, Moremi Game Reserve, Botswana.

Frederique Olivier / Close-up of an African bush elephant (Loxodonta africana) feeding, stripping vegetation from an Acacia tree with its trunk, Serengeti NP, Tanzania.

Frederique Olivier / African bush elephants (Loxodonta africana) feeding, stripping vegetation from an Acacia tree with its trunk, Serengeti NP, Tanzania.

Frederique Olivier / African elephant (Loxodonta africana) feeding, with other elephants in the background, Serengeti NP, Tanzania.

Frederique Olivier / African elephant (Loxodonta africana) reaching with its trunk to feed from a tree, Serengeti NP, Tanzania.

David Kjaer / Pale tussock caterpillar (Dasychira pudibunda) on tree trunk, Wiltshire, UK

Juan Carlos Munoz / Tourists walking among ancient dead Camelthorn tree (Vachellia erioloba) in Deadvlei, Sossusvlei Salt Pan, Namib Naukluft National Park, Namibia

Pete Oxford / View through long grass from back of Domestic Asian elephant (Elephas maximus) Kaziranga National Park, Assam, North East India.

Staffan Widstrand / African elephant (Loxodonta africana) feeding on tree, iMfolozi National Park, South Africa

RHONDA KLEVANSKY / Halfmens / Elephant's trunk plant (Pachypodium namaquanum) flower, Richtersvelt National Park and World Heritage Site, Northern Cape, South Africa, August.

RHONDA KLEVANSKY / Halfmens / Elephant's trunk plant (Pachypodium namaquanum) in flower, Richtersvelt National Park and World Heritage Site, Northern Cape, South Africa, August.

RHONDA KLEVANSKY / Halfmens / Elephant's trunk plant (Pachypodium namaquanum) in flower, Richtersvelt National Park and World Heritage Site, Northern Cape, South Africa, August.

Wim van den Heever / Close-up of the trunk of an African elephant (Loxodonta africana) holding grass, Chobe National Park, Botswana.

Eric Baccega / African elephant (Loxodonta africana) feeding on acacia thorn bush, Samburu National Reserve, Kenya, Africa.

Chris Mattison / 'Halfmens' plant (Pachypodium namaquensum / namaquanum) in arid landscape. Richtersveld, South Africa, October.

Chris Mattison / Young 'halfmens' plant (Pachypodium namaquensum / namaquanum). Richtersveld, South Africa, October.

NEIL NIGHTINGALE / Halfman / Elephant's foot plant {Pachypodium namaquanum} in desert, South Africa

Anup Shah / African elephant picking flowering plant with trunk, Masai Mara, Kenya

Claudio Velasquez / Elephants trunk plants, Richtersveld NR, South Africa

Nicolas Rakotopare / Sri Lankan elephant (Elephas maximus maximus) mother feeding, using foot and trunk to gather the grass. A calf is standing beside its mother for protection. Yala National Park, Sri Lanka. March.

Harry Collins / African bush elephant (Loxodonta africana) juvenile walking near adult. Then the animal stops and raises its trunk. Maasai Mara, Kenya, Africa. November. Endangered.

Bret Charman / African elephant (Loxodonta africana) bull, reaching its trunk into tree canopy to feed on leaves of Sausage tree (Kigelia africana), Mana Pools National Park, Zimbabwe. Endangered.

Ann & Steve Toon / African elephant (Loxodonta africana) carrying a tree branch with its trunk, Mashatu Game Reserve, Botswana. Endangered.

Harry Collins / African elephant (Loxodonta africana) feeding on grass, Maasai Mara, Kenya, Africa.

Tony Heald / African elephant (Loxodonta africana) reaching up with trunk to leafy branches to feed. Mana Pools National Park, Zimbabwe. September.

Tony Heald / African elephant (Loxodonta africana) trunk shaking roots clean before eating. Amboseli National Park, Kenya. July.

Eric Baccega / African desert elephant (Loxodonta africana) eating vegetation on the dry Hoanib Riverbed, Damaraland, Namibia.

Eric Baccega / African desert elephant (Loxodonta africana), walking and eating vegetation on the dry Hoanib Riverbed, Damaraland, Namibia.

Harry Collins / African bush elephant (Loxodonta africana) juvenile standing in a swamp and feeding, using its trunk to pull the vegetation out of the water. A Cattle egret (Bubulcus ibis) is standing on its back. Ja...

Karine Aigner / Asian elephant (Elephas maximus indicus) male, picking up grass with trunk, Bardia National Park, Terai, Nepal.

Joel Sartore / Photo Ark / Endangered male Asian elephant (Elephas maximus), aged 29, named Billy, eating grass, at Los Angeles Zoo, USA. Captivity.

Uri Golman / Close up of an African elephant (Loxodonta africana) amongst thorny Acacia branches, Mara North Conservancy, Kenya. July.

Tony Heald / African elephant (Loxodonta africana) reaching up for foliage, Mana Pools National Park, Zimbabwe. September.

Tony Heald / African elephant (Loxodonta africana) reaching up for foliage, standing on its back legs, Mana Pools National Park, Zimbabwe. September.

Tony Heald / African elephant (Loxodonta africana) reaching up for foliage, Mana Pools National Park, Zimbabwe. September.

Tony Heald / African elephant (Loxodonta africana) reaching up for foliage, standing on back legs, Mana Pools National Park, Zimbabwe.

Tony Heald / African elephant (Loxodonta africana) reaching up for foliage, Mana Pools National Park, Zimbabwe.

Tony Heald / African elephant (Loxodonta africana) reaching up for foliage, Mana Pools National Park, Zimbabwe Sept 2019

Tony Heald / African elephants (Loxodonta africana) with one reaching up for foliage, Mana Pools National Park, Zimbabwe.

Tony Heald / African elephant (Loxodonta africana) reaching up for foliage. Mana Pools National Park, Zimbabwe.

Tony Heald / African elephant (Loxodonta africana) reaching up for foliage, Mana Pools National Park, Zimbabwe.