The information below is about western lowland gorillas.
Females weigh between 50 and 90 kilo; males between 160 and 200 kilo. The information differs quite a bit on various websites and on various information signs in zoos.
The length of a gorilla is not so spectacular as many think. If they're standing upright the females are around 1.4 meter; a male maximum about 1.65 meter. They look huge, but they have short legs. They're also not able to stretch their legs entirely like we do.
Gorillas in our zoos reach the age of about 45 to 50 years. In the wild they don't live that long. Except because of the many threats this is also because in our zoos the gorillas can be examined and treated when they're sick. Something that isn't easy by the way. Anaesthesia is (with many animals) often very risky and before taking that risk, the problem has to be very serious / life threating. Over the past years the maximum age has been adjusted regularly. On 2 February 2016 I read on a sign in Safaripark Beekse Bergen that 35 was the maximum age. Nowadays it says 40 to 45 years.
Gorillas move on hands and feet. Their feet are flat on the ground; their hands on their knuckles. Their feet look like hands, because they have an opposable toe. Because of them moving on hands their thumbs are smaller than ours. That way these thumbs don't bother them when they're moving around.
Information about the other gorilla species (including the western lowland gorilla) can be found here: general information (website of the Dutch Gorilla Foundation).
