I just saw this massive, long bee hovering around my windows

I'm on the 2nd floor which is also the top floor, so I have an attic. Why is this bee here? Do I have a nest in my attic?

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ArishMell · 70-79, M

Might have been looking for a nest site, and if so, a solitary not colony bee species.

I think most species of bees and wasps live solitary lives apart from mating. I saw a leaf-cutter bee taking bits of leaf into a hole in my garden wall, a few days ago.