en 1.8 /summon Mobs & Pets

Monkey
₪ Spawn commonly in the jungle (mostly night), uncommonly in the forest, extremely rarely anywhere else.
₪ They are mostly aggressive.
₪ They will climb trees to reach the player or to get away from the player.
₪ They can also hide in the trees.
₪ They have a 50% chance to drop leather.

- See more at: http://jragoncommands.weebly.com/more-creatures.html#sthash.qplW9y1Q.dpuf