Northern Shoveler

This has some great lines in it: the V shapes from both birds' wings and their bills make some interesting angles with the bills being roughly parallel to the left-most half of the V's. But the concentric circlular wave lines in the water with a second sent originating from the water dripping from the bill of the drake are initially contrasting, until one sees these circular lines reflected in the patterns in their feathers.

The yellow in the eye of the drake is also nicely contrasted with the blue of the water.