The yuugrr was a dim-witted predator famous for stealing Wookiee children out of their beds, then trying to shake their pursuers by going out onto a thin limb. More often than not, the combined weight of the yuugrr and the Wookiee child it was carrying meant that the thin branches that they were trying to escape on broke off, causing the yuugrr, the Wookiee child, and sometimes even the pursuers to fall down to the floor of the Kashyyyk forest.