Like someone mentioned, they could be barn swallows. If the nest is made out of mud with feathers lining it, they're barn swallows. If the mud nest is inclosed, like a jug, they're cliff swallows. Be careful in how you go about dealing with them, they are legally protected and tampering with their nest while eggs and young are in it is bad news. Best option is to wait till they're gone. They're great birds to have around, very beautiful, sound pretty and have quite a bit of character. If they're starlings or house sparrows, those are non-native birds and are not portected by federal law and you can do as you please with them! Take care
Blake
WA
Blake
WA