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

Mitsuaki Iwago / Spotted Hyena (Crocuta crocuta) calling, Serengeti, east Africa

Gerry Ellis / Gombe Land Crab, close-up portrait, Gombe Stream National Park, Tanzania

Gerry Ellis / Hippopotamus (Hippopotamus amphibius) pair swimming in water lettuce, Serengeti National Park, Tanzania

Gerry Ellis / Leaf drip tips, tropical lowland rainforest, Gombe Stream, Tanzania

Gerry Ellis / Desiccated bed of Lake Burungi, Tarangire National Park, Tanzania