Just after acquiring our previous home from the builder, we had an issue with birds in the attic. Called Humane Wildlife Control. They did a good job. The area where the birds were was three stories up, and luckily they had brought a ladder that would reach. The birds had pecked out a gap that the builder had left in the roof. The guys closed it up with some heavy mesh, after removing a half a garbage bag of nest material, and 3 dead birds. Never had any problems after that point. I forwarded the bill to the builder, as it was their error that led to the problem, and they paid it!