I give the same answer to Peter, here I am doing a copy and paste :
Yes it is true that I should only keep one logo, the one is at on one of the photo's 4 corners,
the reason why I am including also a logo in the middle, is that I saw in Facebook of my
woodcock photos that people they are cropping the photo to remove my name and posting
the photo in their public (on woodcock hunting) pages, so I decide I will also put my
logo near the bird or even on some part of the bird to protect my photo.
I am doing this to all my 800x533 pixels photos for internet
of the American Woodcock and the Ruffed Grouse.
I am not against people (hunters) that they take and post my woodcock photos,
but they have not to remove (by cropping the image) the photographer's name.
Camouflaged plumage (18)