A five-meter long line of caterpillars marched along a pathway in eastern Spain in this oddly engrossing video. <br /><br />The caterpillars are doing this to find soft ground to bury in during February time when the footage was shot, where they will re-emerge in the Spain summer as a beautiful silk moth. <br /><br />The procession is lead by the lead caterpillar which leaves a pheromone behind that the others follow, nose-to-tail. <br /><br />These caterpillars can fire out harpoon-shaped urticating hairs, sticking to the victim's skin, which can lead to excessive itching and in some cases anaphylactic shock. <br /><br />The filmer says he: "had a few itches where the hairs from the caterpillars had hooked in my skin."
