Appearances:
Episode V The ice monsters live on the frozen system of Hoth. Luke Skywalker and his Tauntaun were attacked by one the these beasts when scouting the area. It bound Luke to the ceiling of the cave while munching on the Tauntaun meat. The Wampa noticed Luke trying to escape and went after him. Luke reached for his lightsaber and sliced the Wampas arm off and escaped.
Fun fact: In a deleted scene of The Empire Strikes back, several Wampas attack the Echo Base. A few rebels corraled them into a room and lock them in, placing a DANGER sticker on the door.
After Darth Vader and his troops entered the base, Han, Leia and C-3PO ran past this door while being chased. 3PO ripped the sticker off the door, and the imperial troops opened it to check inside...and were mauled by Wampas.