Almost all creatures care for their young. Many animals play with their babies and show their love by touching and hugging them. Most animals clean, feed, and protect their babies. Birds also teach their fledglings how to go about in the world as adults. A number of animals build homes for their young. Tailor birds and weaver birds, ants, wasps, and bees are among nature's master designers, engineers, and architects. They weave, stitch and make different types of homes for their young using twigs, leaves, plant fibers, saliva, piud, wood, and wax. Female elephants care the longest for calves. After a baby is born, it is closely guarded for months. While marching through the jungle, it is made to walk between the mother and an aunt (another adult female). The males of a number of species also help look after the young. The male saltwater crocodile is known to care for its babies when 'mama' is out for a swim. At mealtimes, the chief gorilla keeps a watch while the females and the youngsters feed.