Wild Fowl Likely in Road Ahead Post Mounted Sign - 551.2 R2/RA2 (Face Only)This duck crossing sign is designed for use where wildfowl are frequently found in the road, this is often near ponds or rivers. Diagram or DOT number 551. 2 depicts a single duck let drivers know that they may find ducks or other birds in the road. These are frequently installed in combination with a For distance plate to show the length of the road ducks and other fowl may be present. If you need a distance supplementary plate you can find these