Baboon

Baboons were very intelligent primates, but attend to be cruel and selfish towards other species. Aslan found these apes not worthy to Narnia, so he had them all banished to the north.

At Aslan's Sacrifice, the baboons can be heard screeching with joy.

Soon, the baboons fought in the White Witch's Army against Aslan's forces. Those who survived the battle were dispersed after Aslan's Army won.Later, in the Events of Prince Caspian, they sided with the Old Narnians where they sided with Caspian X and fought against the Telmarines.

Link

 * Olive baboon
 * Mandrill