Posting for traffic. Not sure what to do.
My decking/patio sits on a concrete slab. A bit of it has crumbled away at some point and for the past few days I have spotted (only just now connecting the dots) the odd bee flying in and out of there.
There's no buzzing or anything under the patio but as I'm sat here I've noticed 2-3 bees at a time fly out of the hole usually shortly followed by 2-3 bees flying back like they're taking turns.
There's also some knocking about the garden.
Should I be worried? And what can I possibly do?