Lorraine Bennery / Nile crocodile (Crocodylus niloticus) Ankarafantsika National Park, Madagascar.

Lorraine Bennery / Radiated tortoise (Astrochelys radiata), Tsimanampetsotsa National Park, Madagascar, December. Critically endangered species.

Lorraine Bennery / Vazaha tree (Commiphora sp.) Tsingy Bemaraha National Park, Madgascar.

Lorraine Bennery / Malagasy Paradise Flycatcher (Terpsiphone mutata) Kirindy forest Private reserve, Madagascar.

Lorraine Bennery / Fosa / Fossa (Cryptoprocta ferox) male, head portrait, Kirindy Forest, Western Madagascar, Endemic.

Lorraine Bennery / Broad-billed roller (Eurystomus glaucurus) Tsingy Bemaraha National Park, Madagascar.

Lorraine Bennery / Broad-billed rollers (Eurystomus glaucurus) Tsingy Bemaraha National Park, Madagascar.

Lorraine Bennery / Brygoo's chameleon, / Leaf chameleon (Brookesia brygooi) tiny endemic chameleon. Madagascar.

Lorraine Bennery / Lined leaf-tailed gecko (Uroplatus lineatus) camouflaged on dying leaves. Madagascar.

Lorraine Bennery / Sickle-billed Vanga (Falculea palliata) Ankarafantsika National Park, Madagascar.

Lorraine Bennery / 'Grandmother' Baobab Tree (Adansonia rubrostipa), Lac Tsimanampetsotsa National Park, Madagascar.

Alex Mustard / Dugong (Dugong dugon) male, swims over seagrass meadow (Halophila stipulacea) accompanied by a young Golden trevally (Gnathanodon speciosus). Marsa Nabaa, Marsa Alam, Egypt. Red Sea

Alex Mustard / Dugong (Dugong dugon) male feeding on a seagrass meadow (Halophila stipulacea), accompanied by a young Golden trevally (Gnathanodon speciosus). Marsa Nabaa, Marsa Alam, Egypt. Red Sea

Alex Mustard / Dugong (Dugong dugon) male feeding on a seagrass meadow (Halophila stipulacea), accompanied by a young Golden trevally (Gnathanodon speciosus). Marsa Nabaa, Marsa Alam, Egypt. Red Sea

Alex Mustard / Oceanic whitetip shark (Carcharhinus longimanus) is framed by the surface. Elphinstone reef, Marsa Alam, Egypt. Red Sea.

Alex Mustard / RF - Pod of Spinner dolphins (Stenella longirostris) cruise in formation over the sand of a lagoon while sleeping. Egypt. Red Sea (This image may be licensed either as rights managed or royalty free.)

Klein & Hubert / Lion (Panthera leo) male portrait, South Africa.

Klein & Hubert / Lion (Panthera leo) male portrait, South Africa.

Klein & Hubert / Lion (Panthera leo) male portrait, South Africa.

Tony Heald / African buffalo (Syncerus caffer) herd showing defensive behaviour as an African lioness (Panthera leo) walks by, Mana Pools National Park, Zimbabwe. September....

Tony Heald / Lion (Panthera leo) moving away from a defensive African buffalo (Syncerus caffer) 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.

Anup Shah / Olive baboons standing on the lake shore. Gombe National Park, Tanzania.

Nick Garbutt / Adult male lion (Panthera leo) standing on the banks of the Luangwa River, South Lunangwa NP. Zambia.

Will Burrard-Lucas / Black rhinoceros (Diceros bicornis) mother and calf, Lewa & Borana Conservancy, Kenya.

Will Burrard-Lucas / White rhino (Ceratotherium simum) female and juvenile, Solio Game Reserve, Solio Ranch, Kenya. Taken with remote camera buggy / BeetleCam. EDITORIAL USE ONLY. All other uses require clearance

Will Burrard-Lucas / White rhinoceroses (Ceratotherium simum) with calf playing with adult, Solio Game Reserve, Solio Ranch, Kenya. Taken with remote camera buggy / BeetleCam. EDITORIAL USE ONLY. All other uses require cl...

Will Burrard-Lucas / White rhino (Ceratotherium simum), portrait. Solio Game Reserve, Solio Ranch, Kenya. Taken with remote camera buggy / BeetleCam. EDITORIAL USE ONLY. All other uses require clearance

Will Burrard-Lucas / White rhino (Ceratotherium simum), portrait. Solio Game Reserve, Solio Ranch, Kenya. Taken with remote camera buggy / BeetleCam. EDITORIAL USE ONLY. All other uses require clearance

Alex Mustard / Hard corals (including Acropora sp., Platygyra sp. and Pocillopora spp.) growing in shallow water and reflected in the surface. Ras Umm Sid, Sharm El Sheikh, Sinai, Egypt. Red Sea

Alex Mustard / Dugong (Dugong dugon) male and juvenile Golden trevally (Gnathanodon speciosus) swimming over Seagrass (Halophila stipulacea) meadow. Marsa Nabaa, Marsa Alam, Egypt.

Alex Mustard / Green turtle (Chelonia mydas) feeding on Seagrass (Halophila stipulacea), blowing sand out of nostrils, on sea floor. Marsa El Shouna, Marsa Alam, Egypt.

Alex Mustard / Green turtle (Chelonia mydas) resting on sea floor and two juvenile Golden trevally (Gnathanodon speciosus). Marsa El Shouna, Marsa Alam, Egypt.

Alex Mustard / Spinner dolphin (Stenella longirostris) pod socialising close to surface. Fury Shoal, Sataya Reef, Marsa Alam, Egypt.

Alex Mustard / Oceanic whitetip shark (Carcharhinus longimanus) swimming close to surface. Brothers Islands, Egypt.

Oriol Alamany / Gelada Baboon (Theropithecus gelada) male lying in a forest glade at around 3,000 metres of altitude, Simien Mountains National Park, Amhara, Ethiopia.

Ernie Janes / Ring-tailed lemur (Lemur catta) two huddled together for warmth. Captive.

Karine Aigner / Women and children walking along road carrying fire wood and waving, Democratic Republic of Congo. May 2017.

Karine Aigner / Portrait of two female ecoguards/ rangers, Salonga National Park, Democratic Republic of Congo. May 2017. There are 16 women who work as Ecoguards in Salonga National Park

Karine Aigner / Portrait of female ecoguard / ranger, with colleagues in Salonga National Park, Democratic Republic of Congo. May 2017. There are 16 women who work as Ecoguards protecting the largely untouched 8.9 mi...

Karine Aigner / Portrait of female ecoguard / ranger Salonga National Park, Democratic Republic of Congo. May 2017. There are 16 women who work as Ecoguards protecting the 8.9 million acres of Salonga National Park.

Ann & Steve Toon / RF - Lion (Panthera leo) head portrait at night, Zimanga private game reserve, KwaZulu-Natal, South Africa. (This image may be licensed either as rights managed or royalty free.)

Ann & Steve Toon / Cheetah (Acinonyx jubatus) walking, silhouetted at dusk. Zimanga private game reserve, KwaZulu-Natal, South Africa.

Ann & Steve Toon / African elephants (Loxodonta africana) herd silhouetted at sunset. Chobe National Park, Botswana.

Ann & Steve Toon / RF - African elephants (Loxodonta africana) in water, trunks touching, Zimanga game reserve, South Africa. (This image may be licensed either as rights managed or royalty free.)

Ann & Steve Toon / Ostrich (Struthio camelus) silhouetted in dust storm. Kalahari Gemsbok National Park, Kgalagadi Transfrontier National Park, Northern Cape, South Africa.

Ann & Steve Toon / Meerkats (Suricata suricatta) on the move, Kgalagadi Transfrontier Park, Northern Cape, South Africa.. Second place in the Mammals Category of the GDT European Nature Photographer of the Year Competi...