Butcherbug

Butcherbugs were a species of insect that were native to the swamps of the planet Dagobah. While living in exile on Dagobah, Jedi Grand Master Yoda often found butcherbugs and various other swamp life coming through the door of his hut. He allowed all bar the venomous creatures to stay and keep him company.

Behind the scenes
Butcherbugs were first mentioned in Galaxy Guide 3: The Empire Strikes Back, Second Edition, a Star Wars Legends supplement for Star Wars: The Roleplaying Game written by Michael Stern and released in 1989. The species were confirmed to be canon when they received mention in the reference book Ultimate Star Wars, which was released in 2015.