Karran Mantis
this species of huge insect was native to the planet Karra. Imperial forces which tried to establish a base on the planet discovered that this species of mantis was nearly as large as an AT-AT walker. The Karrans themselves learned how to control the mantises, and used them in battle against their enemies. At the height of the Galactic Civil War, there was only one surviving specimen of Karran Mantis, kept alive by the careful tending of the Karrans.