Mitsuaki Iwago / Black Rhinoceros (Diceros bicornis) charging, Serengeti National Park, Tanzania

Anup Shah / Eastern Chimpanzee (Pan troglodytes schweinfurthii) infant male, two years old, hanging from branch, Gombe National Park, Tanzania

Fiona Rogers / Eastern Chimpanzee (Pan troglodytes schweinfurthii) infant male, one year old, running, Gombe National Park, Tanzania

Konrad Wothe / Chimpanzee (Pan troglodytes) young displaying, Mahale Mountains National Park, Tanzania

Anup Shah / Eastern Chimpanzee (Pan troglodytes schweinfurthii) young male, three years old, curiously approaching, Gombe National Park, Tanzania

Anup Shah / Eastern Chimpanzee (Pan troglodytes schweinfurthii) two year old baby male, named Google, Gombe National Park, Tanzania

Konrad Wothe / Chimpanzee (Pan troglodytes) sub-adult male walking, Mahale Mountains National Park, Tanzania