What year was this? That's one of the areas I covered. Foxes round here routinely kill swans, and I've known them kill half grown Rheas.
The year I saw the Swoose was either 2010 or 11. It was way over in the meadow by the gravel workings/railway. I walked over to them. The year I found an unidentified old carcass on the grass verge by the main road bridge(upstream side) was probably 2012.
I take back what I said about Foxes then.