We have quite a thriving flock of barn swallows that return every spring to build their nests, raise their young, and follow the tractor when we mow hay. And every spring, a pair decides that the barn isn’t good enough for them, and they want to build a nest in the corner of the porch.
This year, I installed a piece of scrap wood for them to use as the foundation for their nest, because the poor things kept trying to attach the mud to the aluminum, and it would simply fall off.
Day 1 of nest building:
5 days later, complete with chicken feathers:
Pretty soon there will be babies squawking for food!