Gorilla Traditional Cache

I am the largest primate
I am the next closest relative to a cacher after the bonobo and the common chimpanzee
I walk on my knuckes
Boys weigh between 135 and 180 kg
Girls weigh between 68 and 113 kg
An adult boy is called a silverback
I can grow to 1.8 meters
I am a gorilla

thanks 2 shadows for helping maintain this cache and an old hag for helping with the co-ordinates

you will need your own pen