Drinking box for birds with his own hands

Some owners due to the limited place on their plot are forced to contain together all their bird - chickens, geese, ducks. In this case, none of the birds can drink clean water, because the ducks are mowed. I decided this problem very simple.
He adapted to drink a two-door tank with a lid (Fig.), 4 cm from the bottom drilled the hole and screwed into it a water tap. Then he took a board-forty and a narrow chisel made a groove, as shown in the picture. In the morning, I fill two buckets of water into the tank, I let her in the groove and setting up a crane on a drop. The bird immediately understood my idea. Suitable straight to the crane and drinks clean water. Excessive water from the groove flows into the subcomplete pelvis, they love to pour ducks in it - I'm fine. The bottom line is that the width of the groove is already than the width of the beak ducks, so they cannot stick the water, and if they are closed, it will be pure from the crane soon.
So that the bird on the board does not trample, over it at a height of 15-20 cm attached a roof, so it's not to climb on the board. Put the tank in the aviary at the grid. You can add water to the tank from the courtyard, without entering the aviary.