Depends on the angle of the pic. Just as in analyzing dog pics. Need one from each necessary angle. Top view, side view, front view, head study, rear view.
Here is a photo essay for comparison I did on a Golden Salmon Marans rooster I once owned. Note the head detail and wing detail. Not filmed thru wire.
Wire is nice for a background to estimate dimensions, but not in front of the bird.
http://waterfordsussexandmarans.webs.com/apps/photos/album?albumid=9380350
One thing I don't have are pics of the underside of the wing and of the shanks/feet.
Make a photo essay like this and put it in photobucket or a quick, free webs.com site. then post the link here.
Best,
Karen