It's a two-eyed, slack-jawed, stationary wooden people eater!

During the Clone War, the need for R2 units increased exponentially. However, all metal was to be used making spacecraft, so, in a desperate attempt to make more R2s, the metalworkers turned to the forest moon of Endor and harvested it's wood. This object is one of the few remaining wooden R2s, for most of the others have eroded.