Generation after generation, birds build nests similar in plan to the ones made by their ancestors. Instinctively, each new family seems to know exactly what type of nest to make, and where. Forty-two varieties of birds and their nests are presented here, from the ostrich whose nest is a hollow scratched into the sand, to the woodpecker for whom a hole in a tree is home. For each different bird, its nest is described and where it's built, the eggs...