Get a bucket of water, a short board, a bag of sunflower seeds. Fill the bucket with water to about 5 inches below the lip. Put the sunflower seeds in the water so it covers the surface of the water. Lay the plank on the lip of the bucket and to the floor. Put a few seeds up the board. The chippy will follow up the board and as it tries to reach the sunflower seeds from the board will fall in. Pour him out in the morning....
I despise chipmunks ever since one ate the wiring in my car one winter.....Argh!