Western Lowland Gorillas form small, non-territorial harems usually dominated by a single, mature male gorilla. They live in structured family groups. A group will consist of one adult silverback gorilla, several unrelated female gorillas and infant gorillas. The silverback gorilla is the dominant gorilla in the family and he regulates the schedule of his group.
A gorillas diet is similar to that of the chimpanzee, however, these gorillas eat larger fruits and mature leaves and stems. The gorillas diet includes parts of at least 97 plant species, as well as invertebrates, such as termites and ants.
About 67% of their diet is fruit, 17% is seeds, leaves, stems and pith. Animal prey, including termites, caterpillars, and other insect larvae make up the rest.
Western Lowland Gorillas eat fruits during the wet season and more herbs and bark in the dry season. They seem to prefer sugary fruits and pith, as well as protein-rich leaves and bark. Like other apes, gorillas feed on seasonal fruits and disperse seeds in their dung as they travel from place to place.
The male gorillas range further in the wet season in search of fruit and spend more time on the ground eating herbs in the dry season. Female gorillas feed higher in the trees and eat more leaves than males.