Roland Seitre / Close-up of Lion's eyes (Panthera leo) Fathala Reserve, Senegal. Captive, occurs in sub-Saharan Africa, Vulnerable species.

Andy Rouse / Bengal tiger (Panthera tigris tigris) 11 month old cub, Ranthambhore National Park, India.

Denis-Huot / Male Lion (Panthera leo) sitting in the rain, Masai-Mara game reserve, Kenya.

Will Burrard-Lucas / African lion (Panthera leo) pair, male nuzzling female, South Luangwa National Park, Zambia. September.

Ben Cranke / Snow Leopard (Uncia uncia) walking down snow covered slope, Hemas National Park, Ladakh, India

Mark Bowler / Black Jaguar or Panther (Panthera onca) snarling, captive, Peru

Anup Shah / Juvenile male Cheetah on bonnet of vehicle looking back under tail at photographer.

Anup Shah / Cheetah (Acinonyx jubatus) cub aged around one year about to bring down a Thomson's gazelle fawn (Eudorcas thomsonii /Gazella thomsonii). Maasai Mara National Reserve, Kenya.

Andy Rouse / Bengal tiger (Panthera tigris tigris) female 'T19 Krishna' stalking in long grass, Ranthambhore National Park, India.

Andy Rouse / Snow leopard (Panthera uncia) pair in high alpine habitat, captive, USA (non-ex)

Anup Shah / Four Cheetahs sitting in row {Acinonyx jubatus} Masai Mara, Kenya

Edwin Giesbers / Jaguar (Panthera onca) portrait, Costa Rica, Captive

Denis-Huot / African lion (Panthera leo) male shaking water off mane after rain, Masai-Mara Game Reserve, Kenya. September.

Ben Cranke / Jaguar (Panthera onca) drinking from the river's edge, Mato Grosso, Pantanal, Brazil. August.

Ann & Steve Toon / Cheetah (Acinonyx jubatus) juvenile portrait, Kgalagadi Transfrontier Park, Northern Cape, South Africa, January 2014

Edwin Giesbers / Jaguar (Panthera onca) close-up head portrait, captive

Anup Shah / Lion (Panthera leo) male feeding on kill. Maasai Mara National Reserve, Kenya.

Anup Shah / African Lionesses (Panthera leo) with their cubs aged 3-6 months walking along a track, Masai Mara National Reserve, Kenya. February

Anup Shah / Juvenile Cheetah {Acinonyx jubatus} chokes young Warthog by gripping its windpipe. Masai Mara GR, Kenya

Andy Rouse / Bengal Tiger (Panthera tigris tigris) female Ranthambore NP, India

Denis-Huot / Lion (Panthera leo) female jumping / hunting, Masai Mara Game Reserve, Kenya

Andy Rouse / Bengal tiger (Panthera tigris tigris) old female 'Machali' drinking, Ranthambhore National Park, India.

Ben Osborne / African lion (Panthera leo) male portrait, Savuti, Botswana. Taken on location for BBC Planet Earth series, 2005

Andy Rouse / Bengal tiger (Panthera tigris) walking portrait, Ranthambhore National Park, India. Crop of image 01500288 Endangered species.

Denis-Huot / Leopard (Panthera pardus) Masai Mara Game Reserve, Kenya

Anup Shah / Cheetah (Acinonyx jubatus) cub aged about one year running. Maasai Mara National Reserve, Kenya.

Oliver Scholey / Male Lion (Panthera leo) silhouetted at sunrise, Masai Mara, Kenya.

Andy Rouse / Cheetah (Acinonyx jubatus) family walking female hunting, Maasai Mara, Kenya, Africa

Denis-Huot / Lioness (Panthera leo) suffocating Zebra (Equus quagga) prey, Masai-Mara game reserve, Kenya.

Andy Rouse / Bengal tiger (Panthera tigris tigris) 11 month old cubs play fighting, Ranthambhore National Park, India.

Mary McDonald / African leopard (Panthera pardus) hunting in long grass, Samburu Game Reserve, Kenya, Africa, November.

Denis-Huot / Leopard (Panthera pardus) young male, portraits, Masai-Mara Game Reserve, Kenya

Denis-Huot / Leopard (Panthera pardus) male rear view, Masai-Mara Game Reserve, Kenya

Denis-Huot / Leopard (Panthera pardus) male standing in grass, Masai-Mara game reserve, Kenya.

Anup Shah / Side profile of Leopard licking its face (Panthera pardus) Masai Mara NR, Kenya

Denis-Huot,Denis-Huot / Leopard (Panthera pardus) female shaking off water after the rain, Masai-Mara Game Reserve, Kenya

Anup Shah / Aggressive Leopard snarling (Panthera pardus) Masai Mara NR, Kenya

Denis-Huot / Leopard (Panthera pardus) female yawning, Samburu game reserve, Kenya

Sharon Heald / Leopard (Panthera pardus) drinking, Etosha National Park, Namibia.

Edwin Giesbers / Snow leopard (Panthera uncia) close up of skin/pelt, captive

Ben Cranke,Ben Cranke / Snow Leopard (Uncia uncia) walking down snow covered slope, Hemis National Park, Ladakh, India

Ben Cranke / Snow Leopard (Uncia uncia) with Himalayan Blue Sheep (Pseudois nayaur) kill, Hemas National Park, Ladakh, India

Dietmar Nill / Captive Snow leopard (Panthera uncia) stalking, partly camouflaged by rocks in Heidezoo, Lüneburg, Germany

Staffan Widstrand / Close-up of Jaguar cat coat {Panthera onca}.

David Pattyn / Jaguar (Panthera onca) resting on a riverbank in Pantanal, Brazil

Edwin Giesbers / Female Jaguar (Panthera onca), captive, occurs in Southern and Central America.

Sergey Gorshkov / Leopard (Panthera pardus) partial head view of adult resting in tree, Okavango Delta, Botswana

Edwin Giesbers / Jaguar (Panthera onca) cub looking over its mother's back, captive, occurs in Southern and Central America.

Denis-Huot / Leopard (Panthera pardus) female at sunset, climbing tree where prey is stored. Masai-Mara game reserve, Kenya.

Roland Seitre / Melanistic Jaguar (Panthera onca) portrait with mouth open. Captive, occurs in Central and South America.

Michael Durham / Juvenile female Puma / mountain lion {Felis concolor} captive, Montana, USA

Claudio Contreras / Mountain lion (Puma concolor) yawning, captive.

Ben Cranke / Puma / Cougar (Felis concolor) sitting and looking at camera, Chile. March.

Ben Cranke / Puma / Cougar (Felis concolor) looking out from a cliff top, Chile. March.

Suzi Eszterhas / Cheetah {Acinonyx jubatus} close up of eyes, Namibia, Captive

Andy Rouse / Cheetah (Acinonyx jubatus) cub playing on tyre, Maasai Mara, Kenya, Africa

Andy Trowbridge / Cheetah (Acinonyx jubatus) portrait. Mashatu Game Reserve, Botswana. July.

Hougaard Malan / Cheetah (Acinonyx jubatus) looking at four gemsbok / oryx (Oryx gazella) in green Kalahari. Kgalagadi Transfrontier Park, Southern Africa, February. Non-ex.

Denis-Huot / Female Cheetah (Acinonyx jubatus) chasing Thomson's gazelle (Eudorcas thomsonii) Masai-Mara game reserve, Kenya.

Denis-Huot / Juvenile Cheetah (Acinonyx jubatus) hunting baby Thomson's gazelle (Eudorcas thomsonii), Masai-Mara game reserve, Kenya.

Denis-Huot / Cheetah (Acinonyx jubatus) sitting on mound below rainbow, Masai-Mara game reserve, Kenya.

Pal Hermansen / Cheetahs (Acinonyx jubatus) mother and baby with Thomson's Gazelle prey, Masai Mara, Kenya.

Andy Rouse / Cheetah (Acinonyx jubatus) cub looking around mother's legs~Maasai Mara, Kenya, Africa

Anup Shah / Cheetah (Acinonyx jubatus) mother watching over cub feeding on the carcass of a Grant's Gazelle (Gazella granti) Maasai Mara National Reserve, Kenya, March

Andy Rouse / Cheetah (Acinonyx jubatus) young playing in front of mother in the rain, Maasai Mara, Kenya, Africa

Andy Rouse / Cheetah (Acinonyx jubatus) chasing gazelle, Maasai Mara, Kenya, Africa

Denis-Huot,Denis-Huot / Lion (Panthera leo) male feeding on a buffalo (Syncerus caffer) Masai-Mara Game Reserve, Kenya. Vulnerable species.

Anup Shah / Lioness (Panthera leo) rejecting a male's advances Maasai Mara National Reserve, Kenya.

Denis-Huot,Denis-Huot / Lion (Panthera leo) male shaking his head after rain, Masai-Mara Game Reserve, Kenya

Denis-Huot / Lion (Panthera leo) female close up of nose an chin, Masai Mara Game Reserve, Kenya

Mark MacEwen / Lioness (Panthera leo) feeding on carcass, Ngorongoro Crater, Tanzania, Africa.

Andy Rouse / African Lion (Panthera leo) 'Notch', star of Disney's African Cats. Masai Mara, Kenya, Africa.

Ole Jorgen Liodden / Lioness (Panthera leo) moving her newborn cub, Okavango, Botswana

Andy Rouse / African lion (Panthera leo) male with tiny cub, Masai Mara, Kenya.

Anup Shah / African lion (Panthera leo) three sub adults approaching remote camera with curiosity, Masai Mara National Reserve, Kenya. February

Denis-Huot / Lion (Panthera leo) males resting, Masai-Mara Game Reserve, Kenya. Vulnerable species.

Will Burrard-Lucas / African lionness (Panthera leo) interacting with cub, South Luangwa National Park, Zambia. September.

Denis-Huot / Lioness (Panthera leo) with two cubs in the rain, Masai-Mara game reserve, Kenya.

Andy Rouse / African lion (Panthera leo) on plains, Masai Mara, Kenya.

John Downer / Lion (Panthera Leo) male running, South Africa taken on location for 'Pride' tv series.

Anup Shah / Lion (Panthera leo) cub aged about 2 years approaching with curiosity - remote wide angle perspective . Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Denis-Huot,Denis-Huot / Lion (Panthera leo) male, Masai-Mara Game Reserve, Kenya. Vulnerable species.

Edwin Giesbers / Sumatran tiger (Panthera tigris sumatrae) close up of skin patterns, captive

Andy Rouse / Bengal tiger (Panthera tigris tigris) 11 month old cubs play fighting, Ranthambhore National Park, India.

Andy Rouse / Bengal Tiger (Panthera tigris tigris) female 'Noor T39' calling to cubs in cave. Ranthambore National Park, India.

Edwin Giesbers / Close-up of an eye of a Sumatran tiger (Panthera tigris sumatrae), captive, native to Sumatra, Indonesia.

Ole Jorgen Liodden / Bengal tiger (Panthera tigris tigris) close up of eye, hidden in vegetation, Bandhavgarh, India.

Edwin Giesbers / Portrait of Siberian tiger cub (Panthera tigris altaica) lying against beside adul, captive

Edwin Giesbers / Rear view of hind legs, pad of foot and tail of Siberian tiger (Panthera tigris altaica) walking away in snow, captive