Spiders can be creepy little creatures, but they are sure to blow your mind away if you like them. These amazing spider-themed wallpapers are for those who love spiders as their pets as well. Spiders are known to have 8 legs and can be quite poisonous too. The legs can creep you out even if the venom is not present. Present on every continent except Antarctica, spiders come in around 40,000 species. Though harmless, the black widow spider can kill with her poison.