The Undarlaif (Rh. "leavings") were large, black jackals that came into the Talath Harroch (southern Rhovanion plain) south of Mirkwood at the time of the Great Plague of T.A. 1636-1637. Originally migrating from the East, they now ranged from the western flanks of the Orocarni to the eastern bank of the Anduin. Their reddish ears complemented and softened their distinct black coloring and their eerie blue eyes, lending them an attractive and somewhat innocent guise that obscured their sly, pitiless ways.