They use tools

Western lowland gorillas have been observed utilizing tools in captivity as well as in the wild. Wild gorillas have only been observed using tools a few times, likely because they spend so much time in forested locations where they are harder for people to watch, but some scientists believe they are frequent tool users. A female gorilla once used a stick to gauge the depth of the water and once as a walking stick to cross deep water. They have also been observed utilizing a log to build a bridge over water.

In captivity, gorillas have been observed utilizing sticks in a variety of ways, including knocking food from trees, threatening other gorillas, making snowshoes out of scrap materials, and building ladders out of logs to climb over obstacles, and more. This is considered one of the most interesting facts about gorillas.