3am is basically the witching hour's lunch break, so yeah that's not nothing.
Had something similar at my old place in Manitoba, scratching and tapping inside the walls at odd hours, pest control found absolutely nothing. Not a single dropping, no entry points, no evidence of anything living in there. The guy looked at me like I was making it up.
What I'd suggest - note down the exact times it happens over the next week or two. If it clusters around 3am consistently that rules out anything with a normal animal sleep cycle. Also pay attention to whether the sound moves or stays in one spot, because that detail matters more than people realise.
Anyone else want to weigh in on this one? Curious if others have had the "no explanation from pest control" situation because I feel like that comes up more than it should.
