molting of a bothrops alternatus snake that lives in south america

snake molt snakeskin curled growth predator reptile skin textured transformation wildlife creepy reptilian wild animal dry nature pattern rural age casing adder peel parched remove biology brown coil detail fauna rattlesnake scaly serpent viper discarded remains leather change venomous poisonous shedding dead hibernation dehydrated bothrops alternatus yarara south america