The fefze beetle were originally a swarm of fefze who were contracted to work on the planet Duro. Fefze were large, beetle-like insects that shared a single group mind; however, due to Duro's pollution, the swarm began to mutate, losing their sentience and becoming aggressive predators. Due to the fact that all native life on the planet was killed off from the pollution, fefze beetles became the only fauna on Duro. Fefze were also able to spit digestive acids at short range.
- Boba Fett: A New Threat
- The Glove of Darth Vader (First appearance)
- Mission from Mount Yoda
- Queen of the Empire (Mentioned only)
- The New Jedi Order: Balance Point
- The Essential Guide to Planets and Moons
- Coruscant and the Core Worlds
- The University of Sanbra Guide to Intelligent Life: The Duros"—Star Wars Gamer 2 "
- The Official Star Wars Fact File 14 (German Edition - DUR4, Duros)
- The Complete Star Wars Encyclopedia
- Suns of Fortune