Back caption: Hear no evil / Bronx Zoo, New York City / Oka, the lowland gorilla, was born in Africa about 1940 and is the largest of the Gorillas in the Bronx Zoo, weighing about 300 pounds. She is still perfectly friendly with her keeper and seems to enjoy pretending to wrestle with him. The keeper really does enjoy it. When she wants to be alone, she covers her ears with her huge hands.