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

Mitsuaki Iwago / Warthog (Phacochoerus africanus) portrait, Serengeti National Park, Tanzania

Mitsuaki Iwago / Leopard (Panthera pardus) resting in tree, Serengeti National Park, Tanzania

Mitsuaki Iwago / Masai Giraffe (Giraffa tippelskirchi) trio crossing grasslands, Serengeti National Park, Tanzania

Mitsuaki Iwago / Spotted Hyena (Crocuta crocuta) sleeping on back, Serengeti

Mitsuaki Iwago / Spotted Hyena (Crocuta crocuta) laughing, Serengeti

Mitsuaki Iwago / Masai Giraffe (Giraffa tippelskirchi) mothers and young running, Serengeti National Park, Tanzania

Gerry Ellis / Mist atop hillsides covered in low montane tropical rainforest inside, Gombe Stream National Park, Tanzania

Gerry Ellis / Gombe stream flowing through dense low montane tropical rainforest inside Gombe Stream National Park, Tanzania

Gerry Ellis / African Elephant (Loxodonta africana) herd foraging, Tarangire National Park, Tanzania

Mitsuaki Iwago / Ostrich (Struthio camelus) male and two females running, Serengeti National Park, Tanzania

Fiona Rogers / Eastern Chimpanzee (Pan troglodytes schweinfurthii) three year old juvenile male, Gombe National Park, Tanzania