Do birds seem to bother the TSI mirror?
Not usually. While we have observed that birds do not seem to like sitting on the TSI, periodic cleaning is a good idea. If your site is in an area with a strong bird population, you may want to add some sharp prongs on top of the TSI imager to prevent birds from landing and blocking the image, or dirtying the mirror just to be on the safe side. These can be purchased at major building material supply vendors.
