Soldato
- Joined
- 13 May 2003
- Posts
- 9,254
You need to identify the type of bee. I’m a bee keeper and I wouldn’t want honey bees in the wall. But given the size of the holes that is unlikely. Bumblebee only nest annually so I’d leave them be then add a bit of external mesh during the winter to stop a repeat. For other solitary bees identify the species and look them up. In all likelihood you can ignore.
