For a 3-D view of the yard without the duck see here. If you load the file, she's sitting underneath the tree behind you, the one not on the lawn but in the middle of the terrace (the tree hasn't noticeably grown since the picture was taken.)
Of course the smart duck has chosen one of the world's excellence centers in theoretical physics because of the intelligent conversation by all the Potentially Ingenious smokers hanging around there.
Okay, okay, maybe it was just the ground color. Look how perfectly she fits in there. (In fact it seems, most people have missed her even though she's sitting directly opposite the door and between two tables.) Too bad I will be away the next weeks.