Rugger

Ruggers were a species of creature native to the moon of Endor. They were capable of singing and did so as they climbed through the villages of members of the sentient Ewok species also native to the moon.

Behind the scenes
Ruggers were first mentioned in The Illustrated Star Wars Universe, a Star Wars Legends book written by Kevin J. Anderson and released in 1995. They were confirmed to exist in canon by the reference book Ultimate Star Wars, which was released in 2015.