![]() The vision and perception of western lowland gorillas is similar to that of humans. This crest serves as the foundation for attachment of a great number of jaw muscle fibers, which allows for the chewing power needed to process tough vegetation. The males’ heads are large and pointed due to the sagittal crest that forms the back of the top of the head. Females are a bit smaller, standing between 4’7” to 4’11”. Males can be between 350 and 450 pounds, almost twice as much as females, weighing in between 150 and 250 pounds. Gorillas are the largest of all primates and reach physical maturity between 12 and 15 years of age. They are also able to stand on two legs for short periods of time. This means that they primarily live on the ground, although they do occasionally climb trees to feed and nest. The species is diurnal, which means they are active during the day, and of all the great apes, gorillas are the most terrestrial. In all gorillas, males develop silver coloration along their backs as they mature. Eastern gorillas tend to be black in color and larger in size. ![]() Western gorillas can be distinguished from other gorilla subspecies by their brownish-gray hair, auburn-colored crests and overall smaller size. ![]() The two species are eastern and western, and the four sub-species are Cross River and Western Lowland (are sub-species of the Western species) and Grauer’s and Mountain (are sub-species of the Eastern species). There are two species of gorilla, each containing two subspecies. ![]()
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