Mud on porch ceiling
(Cross posted in the Pests Forum)
I know this has nothing to do with Decorating, but this is such a knowledgeable bunch that I'm hoping someone has an answer.
The porch ceiling of my new house is covered in spots such as those in the picture. It looks like dirt daubers started building a nest and quit, but there are more of these each day and I've never seen a dirt dauber in the area. I would estimate there are currently 25 or so of these spots on the porch ceiling. Yesterday there was one on the fan blade. Today there are two on the fan blade - both on the same blade.
The porch ceiling is 13+ feet above the porch floor and the ceiling is 20+ feet above the lawn.
I don't know if you can tell or not, but there is little or no depth to these mud spots. They are only on the half of the ceiling farthest from the house. I'm stymied and so is our landscaper.