Please see attached picture. I see fast moving look like flies flying around these holes and sometime I see them land inside these holes but very fast to catch or see how they look like. Any idea what are these? Should I be worry etc. Thanks a lot
Thank you for contacting Toronto Master Gardeners.
Without seeing the insect in question, we are unable to identify it.
For help in identifying the insect, we suggest you consult an organization that specializes in insects, such as the Toronto Entomologists Association,