We went down to Lake Merritt this afternoon, and managed to locate the mysterious hybrid duck. Word on the street is that he is the offspring of a Barrow's Goldeneye and a Hooded Merganser. Sadly, something spooked the entire flock, and they flew off shortly after we arrived.
Mating season has commenced, and this pair of Barrow's Goldeneyes charmed us both. They were inseparable, and he would chase off any encroaching females. It was a sweet sight. (Much nicer than what passes for "love" among the Mallard Ducks.)
We spent a good deal of time trying to get another look at the Tufted Duck, but to no avail. I'm really a pretty sad birder. At least I can usually locate the big, showy, obvious birds.