[DickR]

Several decades ago, and then again a decade later on a different property up here on the lake, a bird nesting outside the house but up under the eaves resulted in an infestation of bird lice, which came into the house. The extermination process was a huge nuisance, and since those occasions I have been careful not to let bird nests get going on our buildings. Yeah, I know, I'm cruel to trash a bird nest, but I don't want to repeat those earlier infestations.