The eastern gorilla is more darkly colored than the western gorilla, with the mountain gorilla being the darkest of all.
The mountain gorilla also has the thickest hair. The western lowland gorilla can be brown or grayish with a reddish forehead.
In addition, gorillas that live in lowland forests are more slender and agile than the more bulky mountain gorilla. The eastern
gorilla also has a longer face and broader chest than the western gorilla.
~wiki~
