Juan Carlos Munoz / Herd of Impala (Aepyceros melampus) silhouetted at sunset, Ngorongoro Conservation Area, 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 / African Lion (Panthera leo) male in Ngorongoro Crater. Ngorongoro Conservation Area, Tanzania. March 2010. (digitally stitched image)

Anup Shah / Thomson's gazelle {Gazella thomsonii} chasing off a marauding Golden jackal {Canis aureus} Ngorongoro conservation area, Tanzania

Anup Shah / Golden jackals {Canis aureus} killing young Gazelle, Ngorongoro conservation area, Tanzania

Anup Shah / Aerial view of village huts and livestock enclosures, in Crater Highlands, Ngorongoro conservation area, Tanzania.

Anup Shah / Aerial view of Crater Highlands, Ngorongoro conservation area, Tanzania.

Anup Shah / Aerial view of village huts in Crater Highlands, Ngorongoro conservation area, Tanzania.

Martin Dohrn / Spotted hyaenas {Crocuta crocuta} on the prowl. Serengeti NP, Tanzania, East Africa. Image taken using 'Starlight Camera' technology without artificial lighting. Ngorongoro Conservation Area,

Martin Dohrn / Spotted hyaenas harrass lioness. Serengeti NP, Tanzania, East Africa. Infra-red image taken at night using 'Starlight Camera' technology without artificial lighting. Ngorongoro Conservation Area,

Martin Dohrn / Spotted hyaena portrait in moonlight {Crocuta crocuta} Serengeti NP Tanzania, East Africa. Image taken using 'Starlight Camera' technology without artificial lighting. Ngorongoro Conservation Area,

Martin Dohrn / Spotted hyaenas {Crocuta crocuta} feeding on kill, Serengeti NP, Tanzania, East Africa. Image taken at night using 'Starlight Camera' technology without artificial lighting. Ngorongoro Conservation Ar...

Martin Dohrn / Hyaenas threatening lions who have stolen kill. Serengeti NP, Tanzania, East Africa. Image taken using 'Starlight Camera' technology and infra red light. Ngorongoro Conservation Area

Martin Dohrn / Pride of fifteen Lions listening for sounds of prey animals in the night. Image taken using 'Starlight Camera' technology abnd infra red light. Serengeti NP, Ngorongoro Conservation Area, Tanzania, Ea...

Martin Dohrn / Lioness stalking Wildebeest at night. Unable to spot the lion, the wildebeest can be hunted without stealth. Image taken using 'Starlight Camera' technology and infra red light. Serengeti NP Ngorongor...

Martin Dohrn / Lioness killing Zebra, Serengeti NP, Ngorongoro Conservation Area, Tanzania, East Africa. Image taken at night using 'Starlight Camera' technology without artificial lighting.

Martin Dohrn / Holding head low, a Gazelle watches lion pride walk by. Serengeti NP, Ngorongoro Conservation Area, Tanzania. Image taken at night using 'Starlight Camera' technology and infra red light.

Martin Dohrn / Male Lion hunting zebra at night, Serengeti NP, Ngorongoro Conservation Area, Tanzania, East Africa. Image taken using 'Starlight Camera' technology and infra-red light.

Martin Dohrn / Maasai herdsman with his cattle. Serengeti NP, Ngorongoro Conservation Area, Tanzania, East Africa. Image taken using 'Starlight Camera' technology without artificial lighting.

Martin Dohrn / Moonlit night-time landscape of kopje Serengeti NP, Ngorongoro Conservation Area, Tanzania, East Africa. Image taken using 'Starlight Camera' technology without artificial lighting.

Martin Dohrn / Night-time in the Serengeti NP, Ngorongoro Conservation Area, Tanzania, East Africa. Image taken using 'Starlight Camera' technology with no artificial lighting.

Suzi Eszterhas / African Lion (Panthera leo) mother and young cubs, Ngorongoro Conservation Area, Tanzania

Suzi Eszterhas / African Lion (Panthera leo) female attacking Cape Buffalo (Syncerus caffer), Ngorongoro Conservation Area, Tanzania

Steve Gettle / African Elephant (Loxodonta africana) bull, Ngorongoro Crater, Ngorongoro Conservation Area, Tanzania

Steve Gettle / Golden Jackal (Canis aureus) parent with pups, Ngorongoro Crater, Ngorongoro Conservation Area, Tanzania

Steve Gettle / African Lion (Panthera leo) cubs, Ngorongoro Crater, Ngorongoro Conservation Area, Tanzania

Steve Gettle / Warthog (Phacochoerus africanus) kneeling to feed, Ngorongoro Crater, Ngorongoro Conservation Area, Tanzania

Steve Gettle / Hippopotamus (Hippopotamus amphibius) at water surface, Ngorongoro Crater, Ngorongoro Conservation Area, Tanzania

Paul Souders/ Worldfoto / African Elephant (Loxodonta africana) calf feeding, Ngorongoro Conservation Area, Tanzania

Paul Souders/ Worldfoto / Grey Crowned Crane (Balearica regulorum) flying, Ngorongoro Conservation Area, Tanzania

Konrad Wothe / Black Rhinoceros (Diceros bicornis) mother and calf crossing savannah, Ngorongoro Crater, Tanzania

Thomas Mangelsen / African Lion (Panthera leo), Ngorongoro Crater, Tanzania

Mitsuaki Iwago / Blue Wildebeest (Connochaetes taurinus) herd migrating, Serengeti National Park, Tanzania

Mitsuaki Iwago / African Elephant (Loxodonta africana) male feeding, Ngorongoro Crater, Tanzania

Mitsuaki Iwago / Black Rhinoceros (Diceros bicornis) mother and baby with Red-billed Oxpeckers (Buphagus erythrorhynchus), Ngorongoro Crater, Tanzania

Mitsuaki Iwago / Black Rhinoceros (Diceros bicornis) portrait, Ngorongoro Crater, Tanzania

Mitsuaki Iwago / Black Rhinoceros (Diceros bicornis) portrait, Ngorongoro Crater, Tanzania

Mitsuaki Iwago / Black Rhinoceros (Diceros bicornis) grazing in grassland surrounded by a flock of Cattle Egrets (Bubulcus ibis), Ngorongoro Crater, Tanzania

Mitsuaki Iwago / Black Rhinoceros (Diceros bicornis) with Cattle Egret (Bubulcus ibis) on its back, Ngorongoro Crater, Tanzania

Mitsuaki Iwago / Black Rhinoceros (Diceros bicornis) calling in tall grass, Ngorongoro Crater, Tanzania

Mitsuaki Iwago / African Lion (Panthera leo) three month old cub sleeping on mother's leg, Ngorongoro Conservation Area, Tanzania

Nick Garbutt / RF - Grant's zebra (Equus quagga boehmi), five drinking in unison at water hole following heavy rainfall. Ngorongoro Conservation Area, Serengeti National Park, Tanzania. (This image may be licens...

Nick Garbutt / Masaai warriors, two silhouetted in ceremonial dance at dusk. Ngorongoro Conservation Area, Serengeti National Park, Tanzania. March 2014.

Nick Garbutt / Masaai warriors, two jumping in ceremonial dance, silhouetted at dusk. Ngorongoro Conservation Area, Serengeti National Park, Tanzania. March 2014.

Nick Garbutt / Masaai woman using traditional stick to clean her teeth. Ngorongoro Conservation Area, Serengeti National Park, Tanzania. March 2014.

Nick Garbutt / RF - Flap-necked chameleon (Chameleo dilepis) on Acacia bush. Ndutu Safari Lodge, Ngorongoro Conservation Area, Tanzania. (This image may be licensed either as rights managed or royalty free.)

Nick Garbutt / RF - Adult bull elephant (loxodonta africana) on the open short-grass plains, near Ndutu, Ngorongoro Conservation Area / Serengeti National Park, Tanzania. (This image may be licensed either as rights...

Nick Garbutt / RF - African lioness (Panthera leo) using Umbrella acacia tree (Acacia tortillis) as a lookout. Ngorongoro Conservation Area / Serengeti National Park, Tanzania. (This image may be licensed either as...