I first noticed this pair of odd ducks in January, when they hung around with the congregation on the Spree. They always kept a bit to themselves at the very edge of the crowd. In March they moved over to a little pond in the Englischer Garten by the Teehaus, where they appear to be the only resident ducks. I assume that they are mallard hybrids, as they resemble these other examples fairly closely. They are most certainly a pair.