In North America, barn swallows breed from Alaska east to Newfoundland, Canada and south to California and east to northern Florida. The barn swallow winters in the tropics south to Argentina. The barn swallow also breeds in northern Europe, northeastern Asia, the Middle East and Northern Africa. European and Asian barn swallows winter in southern Asia and Indonesia and Micronesia. The barn swallow can be found in farmlands, suburbs, marshes and lakeshores.
Barn swallows eat only insects.
Hirundo Barn swallows often mate in the air. Both parents build the nest. Nests are made of mud and lined with grass and feathers. The cup-shaped nest is built under a rock ledge or in the rafters or eaves of buildings. The female lays four to six eggs.