Some variations that distinguish the classifications of gorilla include varying density, size, hair colour, length, culture, and facial widths. Western gorilla Gorilla gorilla and Eastern gorilla Gorilla beringei Adult males are 1. Female gorillas are shorter at 1. The tallest gorilla recorded was a 1. Adult males also have a prominent sagittal crest. The eastern gorilla is more darkly coloured than the western gorilla, with the mountain gorilla being the darkest of all.