The Boy Scouts have taught this trick for years; they call it “spider sniffing,” but professional biologists also use it to find and study spiders that hunt at night. Spiders Lyrics: Weave like spiders we are taught to cast thread into the dark / Some make anchors most are slow to hit the mark / Called to say you're trying we all call out into the light / None Spiders are a unique animal, spinning webs, and Remaining in those webs, until they catch an unsuspecting insect. I caught this one myself. Spiders aren’t that active, regardless of whether the light is on. The light actually draws insects from the outside. Shop for halloween light up spider online at Target. Free shipping on orders of $35+ and save 5% every day with your Target RedCard.