The Peeper is an enemy introduced in Star Fox Adventures. It appears as two green, sinister-looking eyes with no noticeable body that lives within trees and rock walls. It is not able to attack, nor being attacked when the eyes aren't visible. It attacks by shooting green projectiles from its peep hole, and can only be defeated by a shot from the Fire Blaster.
At certain times during the game, tree-inhabiting Peepers must be defeated in order for the tree to fall to explore new areas.