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Range DescriptionThis Sahelian species occurs continuously from Mauritania, the Gambia, Senegal and the north of Guinea and Guinea-Bissau, through Mali, northern Burkina Faso, Niger, northern Nigeria and Chad (Trape and ManÃ© 2006). It occurs as relict, apparently isolated populations in Morocco, Tunisia, Algeria and Western Sahara, although a recent record from Tata in Morocco, almost equidistant between the previously-known localities, suggests that this snake's distribution in this country may be more continuous, and hence "much wider than previously thought" (del Marmol Marin and Fernandez 2012). There may also be an isolated locality on the western border of Libya. It occurs from 100 to 1,000 m asl.