A second challenge is trying to hit them. If you can see them, chances are they can see you. High-flying ducks have a special advantage in seeing you or anything unnatural about your decoys or blind. Ducks are attracted to decoys by their color as well as their shape and formation.
Ducks are mostly concerned with moving objects.
Even if you are caught in the open, remain motioneless and the birds may still come within range. If possible, work into the wind. Ducks rarely decoy or come into the same spot two days in a row, especially if there has been heavy shooting. Ducks are enormous eaters and will sometimes forget about danger if good food is available. This can be seen in city parks where even wild ducks throw caution to the wind and risk everything for a free handout of corn or bread.