Chimps initiated first contact by invading her camp to steal bananas but it was 18 months before she was able to approach them. This was the beginning of their habituation to human observers. Leakey urged that a film record of her observations be made and arranged for wildlife photographer Hugo Van Lawick to make it. Goodall recognized individuals and gave them names. Her observations of the matriarch Flo and her offspring Fifi and Flint revealed the importance of learning how to be a good mother.
Males organize their relationships along a dominance hierarchy .
Charging displays are used to intimidate rivals. One chimp, Mike, added noisy kerosene cans to his display and quickly rose to the top. An episode during a rainstorm revealed a dramatic male display, seemingly directed at nature, not another chimp, and also showed that at 6 years of age Fifi was still dependent on her mother. Jane observed chimpanzees preparing sticks and fishing for termites. The juveniles learn this from their mothers.