First, thanks to everyone who replied to the March Quiz - it definitely has some Mallard in it and is male, due to the curly tail feathers. As for the other parent, a back-cross with Black Duck is one possibility, but I do think there may be some Mottled in there somewhere - check out the black spot at the base of the bill, one ID feature for Mottled, and yes, the duck really was this pale in real life - Black Duck hybrids tend to be fairly dark compared to a normal Mallard. If anyone else has an opinion on the bird I'd like to hear it!
Now, on to the song quiz. I've decided to use Alvan's idea of using surveymonkey so your answers can be anonymous if you so wish! Good luck!