The uller, a horned beast native to Kashyyyk, was known for its cunning hunting skills. Excellently adapted to its home planet, Kashyyyk, these creatures thrived. Their skeletal system was uniquely designed to withstand considerable kinetic force, acting as a natural shock absorber. The uller's head, especially its horns, provided exceptional defense against harm. Sawtooth stands out as the most well-known uller.
The mating vocalization of an uller was quite grating, resembling the sound produced by a hyperdrive.
Before its shutdown on December 15, 2011, ullers were featured in Star Wars Galaxies, a large-scale online multiplayer game created by Sony and distributed by LucasArts.