Bernard Castelein / Culpea or Andean Fox (Pseudalopex culpaeus) standing alert, Siloli Desert, altiplano, Bolivia

Winfried Wisniewski / Burchell's Zebra (Equus burchellii), Masai Mara, Kenya

Winfried Wisniewski / Burchell's Zebra (Equus burchellii), Masai Mara, Kenya

Winfried Wisniewski / Masai Giraffe (Giraffa tippelskirchi) males fighting, Masai Mara, Kenya

Tim Fitzharris / Greater Flamingo (Phoenicopterus ruber) flock taking flight, Lake Bogoria, Kenya

Tui De Roy / Reticulated Giraffe (Giraffa reticulata) mother and calves, Ol Pejeta Conservancy, Kenya

Tui De Roy / Baglafecht Weaver (Ploceus baglafecht) male, Borana Ranch, Kenya

Tui De Roy / African Elephant (Loxodonta africana) trio, Ol Pejeta Conservancy, Kenya

Yva Momatiuk & John Eastcott / Cape Buffalo (Syncerus caffer) bull with Red-billed Oxpecker (Buphagus erythrorhynchus) pair, Masai Mara National Reserve, Kenya

Suzi Eszterhas / Bat-eared Fox (Otocyon megalotis) with thirteen day old pup, Masai Mara, Kenya

Suzi Eszterhas / Grevy's Zebra (Equus grevyi), Lewa Wildlife Conservation Area, northern Kenya

Ingo Arndt / Ostrich (Struthio camelus) female chasing away rival, Masai Mara National Reserve, Kenya

Ingo Arndt / African Lion (Panthera leo) female, Masai Mara National Reserve, Kenya

Ingo Arndt / African Lion (Panthera leo) male portrait, Masai Mara National Reserve, Kenya

Winfried Wisniewski / Great White Pelican (Pelecanus onocrotalus), Lake Nakuru, Lake Nakuru National Park, Kenya

Winfried Wisniewski / African Lion (Panthera leo) females playing, Masai Mara National Reserve, Kenya

Suzi Eszterhas / Bat-eared Fox (Otocyon megalotis) parent and pup, Masai Mara, Kenya

Suzi Eszterhas / Bat-eared Fox (Otocyon megalotis) parent with five day old pups at den entrance, Masai Mara National Reserve, Kenya

Suzi Eszterhas / Bat-eared Fox (Otocyon megalotis) portrait, Masai Mara National Reserve, Kenya

Winfried Wisniewski / African Lion (Panthera leo) male, Masai Mara National Reserve, Kenya

Winfried Wisniewski / Lesser Flamingo (Phoenicopterus minor) pair flying, Lake Nakuru National Park, Kenya

Winfried Wisniewski / African Lion (Panthera leo) male, Masai Mara National Reserve, Kenya

Winfried Wisniewski / Black Rhinoceros (Diceros bicornis) running, Tsavo East National Park, Kenya

Winfried Wisniewski / African Lion (Panthera leo) male, Masai Mara National Reserve, Kenya

Ingo Arndt / White Rhinoceros (Ceratotherium simum) males facing off, Lake Nakuru, Kenya

Ingo Arndt / White Rhinoceros (Ceratotherium simum) mother and juvenile, Lake Nakuru, Kenya

Ingo Arndt / African Lion (Panthera leo) male, Masai Mara National Reserve, Kenya

Suzi Eszterhas / Burchell's Zebra (Equus burchellii) stallions sparring, Masai Mara, Kenya

Suzi Eszterhas / Burchell's Zebra (Equus burchellii) portrait, Masai Mara, Kenya

Suzi Eszterhas / Blue Wildebeest (Connochaetes taurinus) mother and 1 to 3 days old calf running, Masai Mara, Kenya

Suzi Eszterhas / Blue Wildebeest (Connochaetes taurinus) bulls fighting, Masai Mara, Kenya

Suzi Eszterhas / African Lion (Panthera leo) male, Masai Mara, Kenya

Suzi Eszterhas / African Lion (Panthera leo) male walking across grassland, Masai Mara, Kenya

Suzi Eszterhas / Leopard (Panthera pardus) running, Masai Mara, Kenya

Suzi Eszterhas / African Elephant (Loxodonta africana) mother and less than 3 weeks old calf, Masai Mara, Kenya

Suzi Eszterhas / African Elephant (Loxodonta africana) walking across grassland, Masai Mara, Kenya

Suzi Eszterhas / African Elephant (Loxodonta africana) pair, Masai Mara, Kenya

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

Tim Fitzharris / Cape Buffalo (Syncerus caffer) portrait, Kenya

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) six to seven week old cub playing with adult male, 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 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) 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) six to seven week old cub playing with adult male, vulnerable, Masai Mara National Reserve, Kenya

Shin Yoshino / African Lion (Panthera leo) male yawning, Masai Mara National Reserve, Kenya

Shin Yoshino / African Elephant (Loxodonta africana) herd of adults and young, Masai Mara National Reserve, Kenya

Shin Yoshino / African Lion (Panthera leo) male with pair of cubs, Masai Mara National Reserve, Kenya

Gerry Ellis / African Lion (Panthera leo) young male camouflaged in tall grass, Masai Mara, Kenya

Thomas Mangelsen / African Lion (Panthera leo) male portrait, Masai Mara, Kenya

Konrad Wothe / African Elephant (Loxodonta africana) females tending to newborn calf, Kenya

Yva Momatiuk & John Eastcott / African Lion (Panthera leo) female portrait of adult female on termite mound, Masai Mara National Reserve, Kenya

Yva Momatiuk & John Eastcott / African Lion (Panthera leo) adult male with full mane, walking in grassland, Masai Mara National Reserve, Kenya

Tim Fitzharris / African Elephant (Loxodonta africana) parents and two calves with Cattle Egret (Bubulcus ibis) flock, Kenya

Tim Fitzharris / African Elephant (Loxodonta africana) mother leading calf, Kenya

Gerry Ellis / African Elephant (Loxodonta africana) bulls engaged in greeting ritual, Amboseli National Park, Kenya

Yva Momatiuk & John Eastcott / African Lion (Panthera leo) adult male followed by curious and playful six and three month old cubs, Masai Mara National Reserve, Kenya

Jim Brandenburg / African Lion (Panthera leo) mother and cub, Solio Reserve, Kenya

Gerry Ellis / African Elephant (Loxodonta africana) orphan, Maluti, six months old, charging camera, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

Jim Brandenburg / African Elephant (Loxodonta africana) smelling air, Kenya

Gerry Ellis / African Elephant (Loxodonta africana) orphans with keepers, led by Natumi back to stockade, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

Yva Momatiuk & John Eastcott / African Lion (Panthera leo) adult male with full mane roaring to assert dominance, Masai Mara National Reserve, Kenya

Shin Yoshino / African Elephant (Loxodonta africana) mother and calf, Kenya

Winfried Wisniewski / Burchell's Zebra (Equus burchellii) stallions displaying, Masai Mara, Kenya

Winfried Wisniewski / White Rhinoceros (Ceratotherium simum) male grazing, Lake Nakuru National Park, Kenya

Winfried Wisniewski / African Lion (Panthera leo) male, Masai Mara, Kenya

Winfried Wisniewski / African Lion (Panthera leo) female with male flehming, Masai Mara, Kenya

Winfried Wisniewski / African Lion (Panthera leo) male yawning, Masai Mara, Kenya

Winfried Wisniewski / African Lion (Panthera leo) male sleeping, Masai Mara, Kenya

Winfried Wisniewski / African Lion (Panthera leo) male, Masai Mara, Kenya

Winfried Wisniewski / Masai Giraffe (Giraffa tippelskirchi) males fighting, Masai Mara, Kenya

Winfried Wisniewski / Hippopotamus (Hippopotamus amphibius) in water lettuce, Masai Mara, Kenya

Winfried Wisniewski / Topi (Damaliscus lunatus) mother with calf, Masai Mara, Kenya

Winfried Wisniewski / Thomson's Gazelle (Eudorcas thomsonii) male, Masai Mara, Kenya

Winfried Wisniewski / Thomson's Gazelle (Eudorcas thomsonii) male, Masai Mara, Kenya

Winfried Wisniewski / Blue Wildebeest (Connochaetes taurinus) herd crossing Mara River, Masai Mara, Kenya

Winfried Wisniewski / Blue Wildebeest (Connochaetes taurinus) herd with Burchell's Zebra (Equus burchellii) and tourists in landrover and hot air balloon, Masai Mara, Kenya

Winfried Wisniewski / Eland (Taurotragus oryx) male, Masai Mara, Kenya

Winfried Wisniewski / Eland (Taurotragus oryx) sub-adult male with Yellow-billed Oxpeckers (Buphagus africanus), Masai Mara, Kenya

Winfried Wisniewski / Eland (Taurotragus oryx) pair, Masai Mara, Kenya

Winfried Wisniewski / Eland (Taurotragus oryx) pair, Masai Mara, Kenya

Tim Fitzharris / Lesser Flamingo (Phoenicopterus minor) group foraging, Lake Nakuru, Kenya

Tim Fitzharris / Masai Giraffe (Giraffa tippelskirchi) trio at sunrise, Masai Mara, Kenya, composite image

Tim Fitzharris / Masai Giraffe (Giraffa tippelskirchi) in savanna, Kenya

Tim Fitzharris / Ostrich (Struthio camelus) male and females, Masai Mara, Kenya

Tim Fitzharris / Egyptian Goose (Alopochen aegyptiacus) mother and goslings, Kenya

Tim Fitzharris / Blue Wildebeest (Connochaetes taurinus) herd at sunset, Masai Mara, Kenya

Tim Fitzharris / White Rhinoceros (Ceratotherium simum) grazing with Cattle Egret (Bubulcus ibis), Kenya

Tim Fitzharris / Masai Giraffe (Giraffa tippelskirchi) mother and calf, Kenya

Tim Fitzharris / Lesser Flamingo (Phoenicopterus minor) flock flying, Lake Magadi, Kenya

Tim Fitzharris / Lesser Flamingo (Phoenicopterus minor) flock flying, Lake Magadi, Kenya