Hi: I haven't seen a reply to this question. You do not want to use a common feeder because it encourages robbing, not only by bees in the yard, but by any bees within a 1 to 3 mile radius. If any of the robbers are diseased, or infected with mites - every bee sharing the feeder is at risk, as is their colony. So - this is a bad idea. In addition, it will draw in other insects and animals, even if you do try to screen them out. Jerry Bromenshenk Univ. MT [log in to unmask]