Which naturalist in The Trimates studied gorillas?

The naturalist in The Trimates who studied gorillas was Dian Fossey.

Fossey was an American primatologist who began her extended study of mountain gorillas in 1967 in Rwanda’s Virunga Mountains. Louis Leakey encouraged her work after meeting her in the United States, and she established the Karisoke Research Center between Mount Karisimbi and Mount Bisoke.

Her patient observations showed that mountain gorillas formed complex, stable social groups and had individual personalities, communication patterns, family bonds, and shifting hierarchies. She also became a determined opponent of poaching and illegal interference with gorilla groups.

The other two Trimates studied different great apes: Goodall focused on chimpanzees in Tanzania, while Biruté Galdikas studied orangutans in Borneo. Fossey’s research and her book Gorillas in the Mist helped bring international attention to mountain-gorilla conservation, although her confrontational anti-poaching methods remain debated.