Swallow (Boerenzwaluw): Europe and Holland amongst other european countries . Buidls nest from clay eetcetrea attached to ceiling of barns, houses, farms and other buildings.
Red Rumped Martin (Roodstuitzwaluw): mediterranean area
Sand Martin (Oeverzwaluw): builds nest in sand banks of rives and licves in colonies.
Crag Martin (Huiszwaluw):
