Over 54 species of terrestrial reptiles have been recorded in the UAE. These include a large number of lizards, found in all environments from desert, to city, to mountain-top, and a single species of worm lizard. There are thirteen species of terrestrial snake, some of the largest being the sand boa, the saw-scaled viper and the horned viper, and four species of sea snake as well as green sea turtles present in the Persian Gulf. The Ru'us al-Jibal have a gecko of the genus Ptyodactylus named after them. There are two species of amphibian in the United Arab Emirates, the Arabian toad and the Dhofar toad; the former is more commonly seen as the Dhofar toad is nocturnal.