Life in the desert. It grows up to 20 cm (8 in) in length and can live up to 20 years, coloured in camouflaging shades of desert browns and tans; these change from pale colours when warm to darker colours when cold. The species is entirely covered with conical spines that are mostly uncalcified. It also features a spiny "false-head" on the back of the neck, the animal presents this to a potential predator by dipping its real head.
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