A. Ticks are not insects. They are arthropods that are more closely related to spiders. Adult ticks have 8 legs while insects have 6 legs. Ticks are ectoparasites, meaning that they must have a host for most of their life cycle to survive and reproduce. The tick life-cycle includes an egg, larval, nymphal and adult stage. The larval stage of the tick has 6 legs, but when it molts to the nymphal stage, there are 8 legs.