An increasingly filthy window

Though at -13 C and falling I do not propose to clean it any time soon. (Note to self; ideal house must include a shutterable, cleanable viewport with optically coated glass for the camera that points at the bird feeders.)

Taken at a low level above the floor, this one has some interesting reflections that are (I think) internal to the thermopane window.
Very Christmassy, this one.