I can hear squeaking and commotion under my floorboards.
It's not moving from one place and it sounds distressed.
My best guess is, it's a trapped rat. We did have rats last summer (and dealt with them, or so I thought).
I thought nest of baby rats at first, because rats don't usually announce their presence, do they? But it's just one of them, and when it moves it sounds big.
WTF do I do?! Do I pull my floorboards up? What then?
I have an audio recording if anyone wants to hear it to help identify it - is there somewhere online I could upload it?