The Yilltern are a humanoid race that are distinguished by the immense, striped horns - known as montrals - which sprout from each side of their head. Three draping appendages ringed the lower part of their skulls. The coloration of these lekku evolve as a form of camouflage, confusing any predator which might try to hunt the Yilltern. Many beings believe that the Yillterns are venomous, but this was not true. This belief was started when an individual first witnessed a Yilltern feeding on a thimiar, which writhed in its death throes as if poisoned. On their homeworld, Yilltern lived in dense tribes which had strong community ties. The montrals of the Yilltern are hollow, providing the Yilltern with a way to gather information about their environment ultrasonically.