How many ducks would i need to build a aqua duck?

I'm going to be serious here, (and assume you are as well) and assume that you mean an aqueduct. An aqueduct is basically a channel for water to flow through, such as a pipe or canal. You can make these our of concrete, wood, plastic, steel, etc. You could probably find some plans for more complicated ones online that look nice, but if your main purpose is just to move water over large distances, pipes and a pump would be the way to go.