Swallows nest in colonies that may contain from 12 to 500 nesting pairs. They build their nests close to buildings, bridges and other structures. They use mud, hair, grass and feathers to build their nests, sometimes when they are lazy to build a nest they lay their eggs in another swallow’s nests. They spend most of their time catching insects, and the only time they are on the ground is to collect mud for their nests.
