The following is some advice I received from my brother who is a hummingbird bander:


There is a discussion of how to keep bees from your feeders in the book "Do Hummingbirds Hum?" by George C. West & Carol A. Butler. First is to use feeders without any yellow around the ports, second, use only sucrose and water - no red dye and no purchased hummingbird food, third if the bees are feeding from the ports, spray some Pam on the ports as the bees do not like to get their feet in the Pam, while hummingbirds do not perch there and ignore the Pam around the port. Feeders that have the solution a distance below the port opening - far enough so a bee cannot reach the liquid - will deter bees of course - like a "satellite" feeder. Otherwise, make up a 2 to 1 solution - two parts water and one part sugar for one feeder. Place this feeder a distance from the others. Bees will locate this higher concentration of sugar and ignore the 4 to 1 solution in the hummingbird feeders.


Winger West
Millersville, MD