The creatures of Alien Planet Earth take architecture to a whole new level. Orangutans create stick tools and make their own treetop beds; the male bower bird crafts a huge, complex structure to attract a female; spiders build strong, sticky silk webs to trap prey; beavers construct huge dams to create pond habitats; honeybees turn nectar and pollen into wax for hive building; and termites build tall towers using saliva, dirt and dung.