A humanoid species of repto-mammals, the Adarians were bipedal and had walked upright since evolving from herbivorous dinosaurs which favored their hind-legs for reaching hanging leaves. The most distinctive feature of the Adarian skeleton was their elongated skull penetrated by a large cavity which left the skull open from one side to the other. This crest was hollow, and was used for mating calls and amplified by distendable throat pouches. When elongated, the throat pouches helped Adarians to emit a loud subsonic call which helped in communication over long distances, reaching a radius of over 20 kilometers. Lacking ears or noses, their skulls were covered in a fine hair which were sensitive to sound waves; glands below the surface of the skin allowed them to detect odors. Lipless, the