snakes are such reptiles that look like sausages at first glance they seem to have no legs but they actually have legs only they are very small and they are just bones that is why snakes crawl there are different types of snakes regular and poisonous you can tell them apart  for example, by the eye, especially by their pupils or by the shape of the head, for example, and in Brazil there is an Island of Snakes in which there are a lot of such creatures, if you see a poisonous snake, run away!