Many animals are experts at building structures — whether it’s to live in, a place to breed or for protection. Chimpanzees rebuild their nests each night until they are just right within the branches of a tree. Tiny animals called coral polyps are responsible for building coral reefs. And honey bees have hexagonal honeycombs within their hives to store honey and their brood. Of all the builders in the animal kingdom, here are five examples of animal architects.