Smaller colonies are the most vulnerable to robber bees because they do not have a large number of guard bees to protect the colony yet. Our Small Robbing Screen is 3.5" wide x 5" tall so it will fit on almost any nuc or a larger 10 frame box with the entrance reducer...even Layens or Long Langstroth entrance holes. The robbing screen is slotted for quick installation and removal. Two stainless #8 x 1/2" screws are included with the robber screen.How does it work? The screen is placed so the entrance to the hive is as low as possible and the robber bees smell the honey and try to get in through the screen. Meanwhile the "home" bees protect the top opening where most of the robber bees will not use.Installation: Place the robber screen over current hive entrance so that it is as low on the cage as possible. Insert the screws through the skinny part of the opening but only snug the screws to the screen. Then remove the robber screen by lifting the screen and pulling out through the larger openings. After dark (nighttime), simply put the screen back on and in the morning the house bees will re-orient to the top opening of the robber cage. Generally it is not necessary to run a robber screen most of the year unless your bee yard is overloaded with colonies.These items are 3d printed with PETG in various colors; blue, white, red, yellow, orange, and green. We try to ship different colors but if one color is preferred, please specify. This is version 2 of our robber screen and while we are building up our inventory, large orders might be delayed in shipping. Please contact us if you are concerned with when your large order will be shipped prior to ordering.NOTE: Long hives with slotted openings wider than 3.5 inches will need part of the slot closed.
