Snake moves slowly through dry run in Morocco and looks for its way

snake moves slowly dry run morocco reptile slithers desert north africa arid scale scales serpent sand sahara stealthy viper aridity hunt predator camouflage camouflaged predation prey hunted dunes aridness climate adaptation dryness rattlesnake cobra python adder sand dunes fangs fang slink slinking dry run crawls crawling sahara desert moroccan arid climate heat