When I photographed this amphibian, I thought it was a Goose or a Widgeon.  It made a pass over Paine Field while I was waiting for the return of the Bf-109 so I grabbed some shots of it.  It was only as I looked at the shots afterwards – particularly the engine installations – that I realized I didn’t know what it was.  I looked up the registration as saw it was a Gweduck.  This is the only example so far and it is based at Renton.  I would love to see more of it – particularly if that can include some time on the water!