To support its niche of feeding on insects, a spider must have the trait of spinning a web. This is because most spiders use their webs to capture and trap their prey, such as insects. The web provides the spider with a reliable method of securing food and allows them to efficiently catch their prey. While some spiders may also have traits like poisonous venom or night vision, spinning a web is the trait specifically necessary for supporting this particular niche. Eight legs are a characteristic feature of spiders, but they alone do not directly support the feeding on insects niche.
