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]