Duck itch

back home and a walk around the lake I went to see if there was any action with the Grebe but none, this duck came out of the water and was inspecting his feathers. in the summer some swimmers get Duck itch from the water, I am not sure of the cause but its know as duck itch I have never suffered from it but we have very few duck down our side of the lake, except in the opening of duck season, they seem to know that thy are safe