On my walk up river from Upper Arley today 2 dead Mallards floated downstream, one went past on my up stream, and anouther after I had turned back downstream. While it is conceivable that it was the same bird, perhaps it could have caught in branches at the edge of the river and then released again later. I think it's far more likely to be 2 separate birds. Should I be reporting this to anyone? And If so who would I report it to?