Found on a river bank
No interactions present.
It is a mammal. Without a skull or feet to narrow things down, and no size given, it could be almost anything.
That was all that was present. I should have done a scale photo, however it was at least 30cm long. The back section seems to be a tail? as there seems as there are no apparent appendages and no areas where they may be connected.
The bit at the bottom of the picture is the pelvis, with a back leg (femur) attached. The long bit is the spine, with the neck vertebrae at the top of the picture. At 30cm it could still be a lot of things.
Unfortunately the photo isn't really sharp enough even at maximum size, for me to decide whether it is mammalian or avian. I actually think it is avian because there are no transverse processes on the lumbar vertebrae to speak of, and I cannot see spinous processes on the thoracic vertebrae either. The whole look of those bones further up towards the head resemble bird vertebrae rather than mammal as far as I can see. The pelvis is all a bit indistinct but there is a slightly avian look to the right femur ... in my opinion! 30 cm is certainly not too big to be a bird but mammal-wise, it is probably too small to be anything bigger than a rabbit.
You might be right about the bird. It is in far too bad a state to be sure. Processes could have been chewed off. Most of the rest has!
Lat/Lng: 54.2623, -0.8586
OS grid ref: SE744857