Bees in basement

[u/Virtual-Blueberry642]

I’ve been finding what I think are mason bees appear near my nightlight on the unfinished side of my basement for the last week. Usually one every day or so. Today I found two and I can’t figure out where they’re coming from. It’s winter here and my home is no more than 40 years old. Should I be worried?

[u/Individual_Run8841]

No, nothing to worry they use little cracks and holes already there, they are harmless…