Spiders are predators, feeding primarily on insects and household pests. They Are shy and commonly found in dim cool places that are rarely disturbed by humans. Most are active only at night and will try to escape when confronted. Larger spiders may try to bite humans if alarmed, but are generally incapable of piercing human skin. Tropical spiders may be imported with goods - some may be dangerous to human's e.g Black widow (Latrodectus mactans) ad Redback spider (Lactrodectus hasseltii).