A lion walks across the plain in Ngorongoro Crater.

A lion walks across the plain in Ngorongoro Crater.

A lion walks across the plain in Ngorongoro Crater. (U.S. Navy photo by Mass Communication Specialist 1st Class Eric Dietrich/Released)

A lioness rests under a bush during the midday heat

A lioness rests under a bush during the midday heat

A lioness rests under a bush during the midday heat in Serengeti National Park. (U.S. Navy photo by Mass Communication Specialist 1st Class Eric Dietrich/Released)

Cape buffalo graze in Serengeti National Park. (U.S.

Cape buffalo graze in Serengeti National Park. (U.S.

Cape buffalo graze in Serengeti National Park. (U.S. Navy photo by Mass Communication Specialist 1st Class Eric Dietrich/Released)

A female cheetah keeps watch in Serengeti National

A female cheetah keeps watch in Serengeti National

A female cheetah keeps watch in Serengeti National Park. (U.S. Navy photo by Mass Communication Specialist 1st Class Eric Dietrich/Released)

A juvenile male lion eats a warthog in Serengeti National

A juvenile male lion eats a warthog in Serengeti National

A juvenile male lion eats a warthog in Serengeti National Park. (U.S. Navy photo by Mass Communication Specialist 1st Class Eric Dietrich/Released)