To catch, just open the grid door of this queen bee marker, make sure the plunger is out of the way, cover with the unit, and slowly close the door; then be held in place while you mark her by gently pressing the sponge filled plunger of the marking bottle against the grid; The grid's openings are big enough to let worker bees fly out; The bright colors easy to find bee, and the sponge not hurt bee.
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