Every spring the United States and Canada are blessed with the presence of humming birds migrating north to make a home for their coming young. They come from Mexico and South America in search of a cooler, more suitable climate to nest and have a family. Picking the right location for a nest is critical to the survival of the bird’s young. Finding just the right spot is only half the battle, however. Next comes the actual construction, and for a pregnant humming bird it proves to be quite d.