Puzzle duck

Out in the afternoon to Inverleith; 14C and very little wind. Found 4 tufted ducks, lots of mallard, the two swans, black headed gulls, and a puzzle duck; hybrid mallard ? Any suggestions ? 

The new desk came in the morning and was installed by lunchtime; the maker seems willing to do other bits and pieces while I think about the big piece for the front room. Will likely blip it at some point; it's waiting for a switch for the dimmer for the lights to be installed.