Central California location. Urban setting. Trellis with a mature wisteria on the outside of bedroom. Animal/rodent seems to be moving through the wisteria at night only. Scat dropped from wisteria/trellis and when hits ground spreads out as shown in attached picture.
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the picture is unusual in that it is definitely NOT a rodent. It could be fox, opposum, or possibly raccoon. I suggest putting out a piece of cardboard at night, maybe with a piece of bread and jelly in the middle of the cardboard. Sprinkle the board with all purpose flour and see if you can get some foot prints from the nocturnal marauder.