There's a great David Attenborough documentary on channel 10 at 6.30 this evening. It's part of the Life in Cold Blood series, which is excellent. Tonight's episode is on lizards and well worth watching. Dragons of the Dry A look at the immense diversity, social skills, and displays of the lizards. While they are highly adept at camouflage, occasionally there is a need to break cover in order to ward off rivals.