Gorilla

Gorillas are one of the largest primates or apes that are ground-dwelling and predominantly herbivorous in the world of Narnia. They are very intelligent, strong, wise, and loyal beasts to Aslan. Their fur color is black. Gorillas move around by knuckle-walking, although they sometimes walk bipedally for short distances while carrying food or in defensive situations if they're able to fight against an enemy. Though, it's possible that Gorillas can run fast with their arms and legs. Adult males range in height 1.65–1.75 metres (5 ft 5 in–5 ft 9 in), and in weight 140–200 kg (310–440 lb). Adult females are often half the size of a silverback, averaging about 1.4 metres (4 ft 7 in) tall and 100 kg (220 lb). It's unknown where these apes live in the land of Narnia, but it's possible that they inhabit the forests. Gorillas enjoy to eat bananas, and other kinds of fruit that they like in Narnia.

Film
Since Gorillas didn't appear in the books, they appear in the 2005 adaption film, "The Lion, the Witch, and the Wardrobe." After the Hundred-Year Winter ended, Gorillas were first seen in the camp where they gather with all the Narnians when the Pevensies and the Beavers arrive to meet Aslan for the first time. They fought in Aslan's Army against the White Witch's Army in the First Battle of Beruna. One was seen where he was fighting a werewolf. A gorilla is also seen standing alonside a dog behind Edmund jut after Jadis says that Aslan has a traitor in his camp.