Fill two tall vases with cattails. A 12-inch-tall vase is good for a room with 9-foot ceilings. Use a taller vase if your room has higher ceilings. You can also place the vase on a stand to add height. Place a vase at each end of the mantel, 6 inches from the side edges.
Place a polished wooden box in the center of the mantel.
Place a large duck decoy on each side of the box, halfway between the box and the vases. Place the ducks with their heads facing the box. The ducks do not have to match.
Fill a pottery or wooden vase with cattails. Place it at one end of the mantel, 6 inches from the side edge.
Place a large duck on a wooden box on the other end of the mantel.
Arrange several decoys between the vase and the box. Vary the positions of the ducks.
Add a few smaller duck figurines, if desired.