Flies are preparing for hibernation

Flies invaded the empty guest house.

There are hundreds of them there.

They gathered in the room from all over the area.

Flies use cracks in windows and doors to enter.

The flies are going to spend the winter in the guest house.

They will sleep there.

These are the guests :) I have never seen this before.

I will try to be a hospitable host and not kill flies in winter :)