Andy Rouse / Thomson Gazelle (Eudorcas thomsonii) male backlit in long grass. Masai Mara, Kenya, Africa.

Andy Rouse / Thomson Gazelle (Eudorcas thomsonii) male backlit in long grass. Masai Mara, Kenya, Africa.

Anup Shah / Thomson's gazelles (Eudorcas thomsonii) following a herd of Wildebeest (Connochaetes taurinus) as they cross the Mara River, wide angle perspective, Masai Mara National Reserve, Kenya. September

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

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

Anup Shah / Thomsons gazelle (Eudorcas / Gazella thomsonii) crossing a river during migration - wide angle perspective. Masai Mara National Reserve, Kenya. September

Anup Shah / Thomson's gazelles (Eudorcas thomsonii) retreat having changed their minds about crossng the Mara River - wide angle perspective. Masai Mara National Reserve, Kenya. September 2009.

Anup Shah / Thomson's gazelles (Eudorcas thomsonii) and herd of Common / Plains zebra (Equus quagga burchellii) retreat having changed their minds about crossng the Mara River - wide angle perspective. Masai Mara...

Anup Shah / Rear view of Thomson's gazelle (Eudorcas thomsonii) following a herd of Wildebeest (Connochaetes taurinus) as they cross the Mara River, wide angle perspective, Masai Mara National Reserve, Kenya. Sep...

Anup Shah / Thomson's gazelles (Eudorcas thomsoni) males in a stand-off to establish dominance, Masai Mara National Reserve, Kenya. August

Suzi Eszterhas / Thomson's Gazelle {Gazella thomsonii} mating pair, Masai Mara Triangle, Kenya

Suzi Eszterhas / Herd of Thomson's Gazelle {Gazella thomsonii} with grass fire in background, Masai Mara Triangle, Kenya

Suzi Eszterhas / Thomson's Gazelle {Gazella thomsonii} mother grooming newborn calf, Masai Mara Triangle, Kenya

Suzi Eszterhas / Black-backed Jackal (Canis mesomelas) feeding on carcass, Masai Mara, Kenya

TJ Rich / Thomson's gazelle (Gazella thomsonii) new born calf, Masai Mara Reserve, Kenya

TJ Rich / Thomson's gazelle (Gazella thomsonii) new born calf scratching, Masai Mara Reserve, Kenya

Anup Shah / Thomson's gazelle {Gazella thomsonii} mother attempts to defend its fawn from a Golden jackal {Canis aureus} Ngorongoro conservation area, Tanzania

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

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

Anup Shah / Distressed Female Thomson's gazelle {Gazella thomsonii} watches Golden jackals {Canis aureus} feeding on its baby, Ngorongoro conservation area, Tanzania

Anup Shah / Golden jackals {Canis aureus} hunting Thomson's gazelle with young {Gazella thomsonii} Ngorongoro conservation area, Tanzania

Suzi Eszterhas / Ngorongoro Conservation Area, Tanzania with Thomson's Gazelle {Gazella thomsonii} on plains at sunset under moon.

Anup Shah / Thomson's gazelle {Gazella thomsonii} Masai Mara reserve, Kenya