|Also known as:||Silverback|
|Place of origin:||Earth|
|Appearance:||The Last Dodo|
Unlike humans, a mountain gorilla's arms were longer than its legs, which forced the animal to either adopt a four-limbed approach to walking or walk on two legs with its knuckles dragging.
The creatures were last seen on Earth in 2030, and had been killed off because their habitat was destroyed and they were hunted by humans for bushmeat. However, the last mountain gorilla was really sent to the Museum of the Last Ones, until it was sent back to its own time by the Tenth Doctor.