THE FLYING AND FRILLED LIZARDSome lizards discovered in the fossil record, like Kuehneosaurus and Icarosaurus, resemble the flying dragon, Draco, which is still found in southeastern Asia. This small lizard does not fly, but leaps and glides hundreds of feet like a flying squirrel. The frilled lizard, Chlamydosaurus kingi, lives in northern Australia and New Guinea. When the lizard is threatened it opens its mouth and brings the frill forward from where it normally rests on its shoulders. In a 20-cm (8-in) adult the frill may be 18 cm (7 in) across. This defensive action intimidates predators, facilitating the lizard’s escape. It also can run bipedally, holding its forelegs and tail off the ground. Various lizards are known to use their curious appendages for communication, as well as for defensive purposes. The Australian Bearded Dragon, for example, utilizes an elaborate social communication system, involving rapid head bobbing, "push ups," arm waving, tail twitching and displaying its beard. One wonders if some dinosaurs might not have utilized similar means of communication.