Another small adder but now the true desert variety is the Peringuey's Desert Adder or Sidwinder adder - Bitis peringueyi.
These little guys and gals are found in the dune deserts off the Namibia coast.
With eyes placed on the top of their heads they bury themselves in the dune sand. They have a black tipped prehensile tail that they wave around and wiggle to attract lizards
They get much of their water in this dune environment from their prey the desert lizards
By Václav Gvoždík - http://calphotos.berkeley.edu, CC BY-SA 2.5, Link
Their other interesting prey is the Barking Gecko
By Bernard DUPONT from FRANCE - Common Barking Gecko (Ptenopus garrulus), CC BY-SA 2.0, Link
Check out the fringes on its toes, from whence it gets its name, "feather-foot" Ptenopus in classical Greek