Tripod

The "tripods," as they were dubbed by Luke Skywalker, were a sapient species of three-legged beings with sac-like bodies. They were indigenous to an Imperial planet in the Outer Rim, on the route from Pzob to Belsavis. A number of them were taken prisoner aboard the Eye of Palpatine, where their needs were taken care of by the gentle Talz. Luke was unable to identify their species by proper name.