Even an Ostrich Needs a Nest: Where Birds Begin

How does a bird make its nest? Very carefully! Many birds build intricate nests out of twigs, leaves, feathers, mud--even dollar bills and clothespins. Some nests are gigantic, housing hundreds of birds or weighing as much as a car, while others are just large enough to keep one egg safe and warm. Whether simple or fancy, every species finds a unique way and clever place to raise its young.