Hi all. We are very lucky and have many nesting pairs of swallows which come back year after year. This year we are turning one if our outbuildings into an office and there are some old swallow nests in there. We have put some fish wire over the holes in the doors to stop the swallows getting to them to use them for nesting but I am distressed to see themcontinually trying to get to the nests.
Have we done a terrible thing? Will they eventually rebuild their nests elsewhere or will this have a detrimental impact on thir survival? We have put out trays of mud, cotton buds and fibrous material tofacilitate nest building but we are very worried about the impact we are having. Any thoughts anyone?