| Different birds build different kinds of nests, and each one is marvelous in its own way. The nest of the swallow is particularly interesting, for it is built out of mud, although reinforced with bits of grass to hold it together. The swallow must fill its beak up to 500 times with dirt, then mix it with saliva, to form enough mud for its nest. Maybe you have seen one, for they often build them in barns, or even under the roofs of porches of houses. We have an elevated deck on our home, on the level of the second floor, and swallows regularly build their nests under it. |