Bumble Bee Barrier

thingiverse

There are some gaps in the outer walls of our house where the mortar is missing, likely left for ventilation purposes. Some of these openings attract bumblebees that visit them regularly. While this isn't a major concern, it's unwanted near our outdoor living space. As an aside, I'm planning to install barriers by early September. From then on, you shouldn't see any more bumblebees flying around. UPDATE 05/07/2018: A revised version of the barrier that's less prone to breakage has been added. It's suitable for ventilation holes with dimensions ranging from 8x50mm up to 15x70mm.