The helmeted gecko or helmethead gecko (Tarentola chazaliae) is a member of the gecko family native to the northwestern coast of Africa, where it is present in Western Sahara, Mauritania and Morocco. The environment in which this gecko lives is sandy and rocky desert with sparse vegetation, in a zone near the coast where the humidity is high. The adult helmeted gecko has a snout-to-vent length of 7.5 cm (3.0 in) and a total length of about 11 cm (4.3 in). The head is covered with small granulations and the tubercles at the back of the head are enlarged and form a casque. The digits are flattened and spatulate. Helmeted geckos can be anywhere from light grey to dark brown, either uniform in color or with pale or dark blotches. The underside of the gecko is light-colored.