Another from this way-cool duck (and its female close friend) that associated with Mallards for a couple of days this past winter, which helped in making it so much tamer than most others of this species (at least for us up here). A long lens and close approach was the best strategy as many of those Mallards were too often than not in the way - in front and behind!
Canon 7DII + 500mm f/4 II + 1.4TC III, manual exposure, evaluative metering, 1/1250, f/10, ISO 800, natural light, handheld, FF, eye-work to rid of extra reflections.