Ring necked Duck or hybrid at Inchiquin

  During the week I came across a Ring necked Duck at Lough Inchiquin.

Even with a head shape that looks good a white spur that says it all, a tail that stands out and a stripe on the bill, there is still a good chance of this bird being a hybrid RnD and Tufted Duck due to a lack in the high white line on the bill.... I wonder if his grandma was a tufty?