Why does small caddis fly larves cover themselves with pebbles and small twigs?

Small caddisfly larvae cover themselves with pebbles and small twigs to create protective cases that serve as camouflage from predators. These cases also provide structural support and can help the larvae blend into their natural environments. Additionally, the materials used can aid in regulating temperature and moisture levels, enhancing their survival in aquatic habitats. This behavior is a crucial adaptation for their development and safety.