Sandesh Kadur / Blue wildebeest (Connochaetes taurinus) crossing a river, Serengeti National Park, Tanzania.

Fred Olivier / Young Burchell's zebra (Equus burchellii) playing, biting and kicking its mother, Serengeti NP, Tanzania.

Will Burrard-Lucas / Lion (Panthera leo) walking over the plain, taken with remote camera. Serengeti National Park, Tanzania. December

Thomas Marent / African Elephant (Loxodonta africana) crossing dirt road near tourists, Serengeti National Park, Tanzania

Andy Rouse,Andy Rouse / African Elephant (Loxodonta africana) breeding herd led by matriarch. Maasai Mara, Kenya, Africa, August.

Andy Rouse,Andy Rouse / African Elephant (Loxodonta africana) breeding herd in rainstorm during migration. Maasai Mara, Kenya, Africa, August.

Andy Rouse / African Elephant (Loxodonta africana) silhoutted against setting sun. Maasai Mara, Kenya, Africa, August.

Charlie Summers / Stars draw traces above Naabi Hill acacia trees, Serengeti National Park, Tanzania

Charlie Summers / Plains Zebra (Equus quagga) in a dominance fight with dust flying, Lake Magadi, Serengeti, Tanzania.

Charlie Summers / Maasai Giraffe (Giraffa camelopardalis) feeding on Acacia tree, Serengeti, Tanzania

Nick Garbutt / Acacia sp. at night, with a herd of Plains Zebra (Equus quagga) beneath. Near Ndutu, Nogorongoro Conservation Area, Serengeti National Park, Tanzania.

Nick Garbutt / Herd of White-bearded Wildebeest (Connochaetes taurinus albojubatus) with calves in Long Gully near Ndutu on their annual migration. Ngorongoro Conservation Area, Serengeti Ecosystem, Tanzania. (Digit...

Nick Garbutt / Masai Giraffes (Giraffa camelopardalis) on open plains browsing Whistling Thorn Acacia (Acacia drepanolobium). Slopes of the Ngorongoro Highlands with the Serengeti Plains beyond, Tanzania. (Digitally...

Nick Garbutt / Male African Lion (Panthera leo) playing with 4 month cub. Big Marsh, near Ndutu, Nogorongoro Conservation Area, Serengeti National Park, Tanzania.

Anup Shah / Baby Rock hyrax (Procavia capensis) on a rock, Serengeti NP, Tanzania 2007

Mary McDonald / Common Zebra (Equus quagga) stallions fighting. Naabi Plains, Serengeti National Park, Tanzania.

Mary McDonald / Common Zebra (Equus quagga) stallions fighting. Naabi Plains, Serengeti National Park, Tanzania.

Anup Shah / Common / Plains Zebra (Equus quagga burchellii) adult leaping as herd runs away from the Mara River - wide angle perspective, Masai Mara National Reserve, Kenya. September

Anup Shah / Masai giraffe (Giraffa camelopardalis tippelskirchi) crossing the Mara River - wide angle perspective, Masai Mara National Reserve, Kenya. August 2009.

Staffan Widstrand / Two Cheetahs (Acinonyx jubatus) touching noses in greeting display, Serengeti NP, Tanzania, East Africa, January

Staffan Widstrand / Two Masai Giraffes (Giraffa camelopardalis tippelskirchii) heads silhouetted against sky, above tree line at dusk, Serengeti NP, Tanzania, East Africa, January

Staffan Widstrand / Plains / Common Zebra (Equus quagga / burchelli), galloping through trees, silhouetted at dusk, Serengeti NP, Tanzania, East Africa, January

Staffan Widstrand / Herd of Wildebeest (Connochaetes taurinus) silhouetted at dusk, Serengeti NP, Tanzania, East Africa, January

Guy Edwardes / Black-shouldered Kite (Elanus caeruleus) preening feathers, Serengeti National Park, Tanzania, Africa February

Guy Edwardes / Grey-breasted Spurfowl (Pternistis rufopictus) calling, Serengeti National Park, Tanzania, Africa February

Guy Edwardes / Superb Starling (Lamprotornis superbus) with wing raised as a threat to nearby rival. Serengeti National Park, Tanzania, Africa, February

Guy Edwardes / African White-backed Vulture (Gyps africanus) close-up in flgiht, coming in to land on carcass, Serengeti National Park, Tanzania, Africa, February

Guy Edwardes / Ruppell's Griffon Vulture (Gyps rueppellii) flying against storm clouds, coming in to land on carcass Serengeti National Park, Tanzania, Africa, February

Mary McDonald / Flock of Cattle Egrets (Bubulcus ibis) in roosting trees at dusk, Imba Ndutu, Serengeti NP, Tanzania, East Africa.

Nick Garbutt / Female Leopard (Panthera pardus) feeding on a wildebeest kill dragged into a tree, Serengeti National Park, Tanzania

Nick Garbutt / Massing herds of White bearded wildebeest (Connochaetes taurinus albojubatus) on migration, Serengeti National Park, Tanzania

Anup Shah / Lesser flamingo {Phoeniconaias minor} solitary chick on lake shore with no water, Lake Nakuru NP, Kenya

Anup Shah / Low level view of Lesser flamingos taking off and flying (Phoeniconaias minor). Wide angle perspective. Lake Nakuru National Park, Kenya. July 2007.

Anup Shah / Low level view of Lesser flamingos taking off - wide angle perspective (Phoeniconaias minor) Lake Nakuru National Park, Kenya. Jul 2007

Anup Shah / African elephant {Loxodonta africana} low angle shot, Serengeti NP, Tanzania

Anup Shah / African lion {Panthera leo} pride, low angle shot, Serengeti NP, Tanzania

Anup Shah / Marabou stork {Leptoptilos crumeniferus} low angle shot with Warthog in background, Serengeti NP, Tanzania

Martin van Lokven / African Lion (Panthera leo) female, Serengeti National Park, Tanzania

Anup Shah / Thomson's gazelle {Gazella thomsoni} male on savanna at sunrise / sunset, Serengeti NP, Tanzania

Anup Shah / Nasera Rock with Zebras and Wildebeest moving into Anata kiti, Serengeti NP, Tanzania

Suzi Eszterhas / Cheetah (Acinonyx jubatus) chasing male Thomson's Gazelle (Eudorcas thomsonii), Masai Mara National Reserve, Kenya

Anup Shah / Two male African lions {Panthera leo} fighting near kill, Serengeti NP, Tanzania

Yva Momatiuk & John Eastcott / African Lion (Panthera leo) courting male and female, Masai Mara National Reserve, Kenya

Anup Shah / Nile crocodile {Crocodylus niloticus} close up of mouth and teeth, Serengeti NP, Tanzania

Anup Shah / Low angle Wildbeest {Connochaetes taurinus} on the move, Serengeti NP, Tanzania

Anup Shah / Spotted hyaena {Crocuta crocuta} running with prey of Thomson's gazelle fawn, Serengeti NP, Tanzania

Anup Shah / Wildebeest {Connochaetes taurinus} mass on migration, Serengeti NP, Tanzania

Anup Shah / Family of Common zebra {Equus quagga} senior mare in front, stallion at rear, pass through throng of Wildebeest at start of migration, Moru, Serengeti NP, Tanzania

Anup Shah / African lion {Panthera leo} male watching through grass, Serengeti NP, Tanzania

Anup Shah / Family of young Rock hyrax {Procavia capensis} sunning on rock, Serengeti NP, Tanzania

Anup Shah / Low angle Warthog {Phacochoerus aethiopicus} about to wallow in mud, Serengeti NP, Tanzania

Anup Shah / Nile crocodile {Crocodylus niloticus} lunges for Wildebeest {Connochaetes taurinus} which leaps out of its reach, Grumeti river, Serengeti NP, Tanzania

Anup Shah / Leopard {Panthera pardus} with young suckling, Serengeti NP, Tanzania

Mitsuaki Iwago / African Lion (Panthera leo) cub feeding on Cape Buffalo (Syncerus caffer) carcass, Serengeti National Park, Tanzania

Mitsuaki Iwago / African Lion (Panthera leo) female attacking Burchell's Zebra (Equus burchellii), Serengeti National Park, Tanzania

Mitsuaki Iwago / African Lion (Panthera leo) mating pair quarreling, Serengeti National Park, Tanzania

Mitsuaki Iwago / African Lion (Panthera leo) mother and cub, Serengeti National Park, Tanzania

Mitsuaki Iwago / Cape Buffalo (Syncerus caffer) eyeing Red-billed Oxpecker (Buphagus erythrorhynchus), Serengeti National Park, Tanzania

Suzi Eszterhas / African Lion (Panthera leo) mother and young cubs, approximately 8 weeks old, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) mother growling at curious 4 month old cub playing with tortoise, vulnerable, Masai Mara National Reserve, Kenya, sequence 3 of 4

Suzi Eszterhas / African Lion (Panthera leo) curious four month old cub, playing with tortoise, vulnerable, Masai Mara National Reserve, Kenya, sequence 2 of 4

Suzi Eszterhas / Cheetah (Acinonyx jubatus) 7 to 9 month old cubs playing, Masai Mara National Reserve, Kenya

Mitsuaki Iwago / African Elephant (Loxodonta africana) mother and calf, Serengeti National Park, Tanzania

Mitsuaki Iwago / African Lion (Panthera leo) male portrait, Serengeti National Park, Tanzania

Mitsuaki Iwago / African Lion (Panthera leo) female roaring, Serengeti National Park, Tanzania

Mitsuaki Iwago / African Lion (Panthera leo) female leaping, Serengeti National Park, Tanzania

Anup Shah / Thomson's gazelle {Gazella thomsonii} at sunset / sunrise, Serengeti NP, Tanzania

Anup Shah / Banded mongoose {Mungos mungo} foraging for parasites on skin of Warthog {Phacochoerus aethiopicus}, Queen Elizabeth NP, Uganda

Anup Shah / Herd of Common zebra drinking {Equus quagga} Serengeti NP, Tanzania

Suzi Eszterhas / Spotted Hyena (Crocuta crocuta) adult female yawning at den, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) seven to eight week old cub approaching adult male, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) seven to eight week old cub playing with adult male, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) seven to eight week old cub playing with adult male, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) seven to eight week old cub approaches adult male, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) seven to eight week old cub playing with its mother's tail, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) six to seven week old cub playing with adult male, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) five week old cub portrait, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) six to seven week old cub playing with adult male, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) four to five week old cubs, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) five week old cub playing with adult male after being introduced to pride for the first time, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) five week old cub approaches adult male after being introduced to pride members for the first time, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) five week old cub, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) adult female with rainbow in background, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) adult female with rainbow in background, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) five to six week old cub resisting being picked up by its mother, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) five week old cubs playing with an adult pride member's tail, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) five week old cub, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) six to seven week old cub, vulnerable, Masai Mara National Reserve, Kenya

Suzi Eszterhas / African Lion (Panthera leo) six to seven week old cub playing with adult male, vulnerable, Masai Mara National Reserve, Kenya

Bernard Castelein / Agama lizard on kopje (Agama agama) Serengeti NP, Tanzania, East Africa

Anup Shah / Marabou stork stretching wings at waterhole {Leptoptilos crumeniferus} low angle shot, Serengeti NP, Tanzania

Anup Shah / Sun setting over Serengeti NP with Acacia tree, Tanzania

Anup Shah / Wildebeest (Connochaetes taurinus) feeding on plains of Serengeti NP wiht big sky, Tanzania

Anup Shah / Dwarf mongoose with young {Helogale parvula} Serengeti NP, Tanzania

Anup Shah / Wildebeest running at sunset {Connochaetes taurinus} herd on migration, Serengeti NP, Tanzania

Anup Shah / Wildebeest herd on migration {Connochaetes taurinus} with Common zebra {Equus quagga} Serengeti NP, Tanzania