There are 32 striped spiders. Spiders can feel the vibration when their prey collides with the spider web or is trapped; After the spider finishes the web, it will wait for its prey to fall into a trap on or near the web. Some silk in cobwebs is sticky, while others are not. For example, radial cobwebs are not sticky in the longitudinal direction, but somewhat sticky in the horizontal direction. Because spiders' own actions are also influenced by their own mucus, they will avoid stepping on silk threads with mucus when they are online.