Another reason to love orb weaving spiders besides their glorious webs is how they spin them. Every night, the spider lets the web sit out under your porch light. Tiny little bugs - too small for the spider to detect - fly in and get stuck. Mosquitoes, gnats, etc. In the early morning, the spider goes around the entire web and eats all the sticky parts, along with the mosquitoes. Then it re-spins the web. Thus, every orb weaver eats 100+ mosquitoes every single morning. They're fabulous.