One of these is not like the others...
What a strange sight: I went to the Isis by Christ Church Meadow, and spotted this very peculiar mallard. He looks like a hybrid mallard goose and is absolutely huge! He thinks he's a normal mallard and behaves like one (quacking and doing their normal courtship moves), but is almost twice the size of all the others. I've put up a whole load of shots of him on Flickr (with other animals for scale), so do take a look if you're interested (right from here).
The other two highlights of my walk were seeing a muntjac deer (on the other side of the Cherwell: I got no photo but it was a thrill to see the little thing!) AND finding O.G. still mooching with its parents.
M-oose, mallards, and goose
Little and large
M-oose and geese