As per YouTube these look to work well and are selective. But they are made to fit a Nutella jar and the thread & size is not that common here. There are ones to suit UK sizes as free to use 3D printer design files available if you have a printer. If you do not have a 3D printer or access to one they are available from Marsh Apiaries. This type are for general trapping through the year. We (
[email protected]) have a version designed for spring Queen trapping, the entrance and escapes holes are resized to maximise the chances of catching an AH Queen and allow as much bycatch to escape without releasing the AH Queen. They are smaller (not intended for large quantities of workers) and will fit on a typical 1lb jam jar. We estimate that we will be able to sell these at £1.00 each + postage. Asian Hornet Alert are a non profit community group/club set up to fight or manage the Asian Hornet problem, open to all, Beeks, non-beeks and other groups.