This episode focuses on the adaptations of arachnids and insects. Spiders inhabit backyards that design and build intricate silk webs. They have also developed numerous adaptations that make them efficient predators. Backyards also have insects living above and below the water's surface. More amazing adaptations are introduced including incomplete metamorphosis, eye development, and remarkable breathing apparatus. Part of the "Backyard Bugs & Other Arthropods" series.