A number of artists stop by here on occasion to refer to anatomy for various projects. Without expert gorilla-anatomy artists, we wouldn’t have such great gorilla representations in movies like Planet of the Apes, Skull Island, and Rampage.
Gorillas move around by knuckle-walking, although they sometimes walk bipedally for short distances while carrying food or in defensive situations. Wild male gorillas weigh 135 to 195 kg (300 to 430 lb) while adult females usually weigh half as much as adult males at 70–115 kg (150–250 lb). Adult males are 1.5 to 1.8 m (4 ft 11 in to 5 ft 11 in) tall, with an arm span that stretches from 2.3 to 2.6 m (7 ft 7 in to 8 ft 6 in). Female gorillas are shorter, with smaller arm spans. Adult male gorillas are known as silverbacks due to the characteristic silver hair on their backs reaching to the hips. The tallest gorilla recorded was a 1.95 m (6 ft 5 in) silverback with an arm span of 2.7 m (8 ft 10 in), a chest of 1.98 m (6 ft 6 in), and a weight of 219 kg (483 lb), shot in Alimbongo, northern Kivu in May 1938. The heaviest gorilla recorded was a 1.83 m (6 ft 0 in) silverback shot in Ambam, Cameroon, which weighed 267 kilograms (589 lb). Males in captivity are noted to be capable of reaching weights up to 275 kg (606 lb). Gorilla facial structure is described as mandibular prognathism, that is, the mandible protrudes farther out than the maxilla. Adult males also have a prominent sagittal crest.