A monster species inhabited the jungle moon Yavin 4. It was large, with shaggy hair and tusks, and hunted in the jungle. In 23 ABY, one creature attacked the spacer Peckhum outside the Jedi Praxeum but was sent back into the jungle by Jedi Master Luke Skywalker.
In 23 ABY, the spacer Peckhum landed his supply shuttle, the Lightning Rod, on Yavin 4 during one of his supply runs to the Jedi Praxeum and was attacked by one such monster. He grabbed his blaster rifle in order to defend himself, but Jedi Master Luke Skywalker realized that the monster was not attacking him but was simply confused, and he flung Peckhum's weapon from his hands. After Skywalker calmed the monster, to the amazement of his Jedi students Jacen Solo, Jaina Solo, and Tenel Ka, as well as Peckhum, the monster ran back into the jungle to seek out different prey.
The monster first appeared in Young Jedi Knights: Heirs of the Force, which was written by Kevin J. Anderson and Rebecca Moesta, and released in 1995.