I eventually caught up with this first year Buff-breasted Sandpiper at Davidstow. This is my fifth visit this autumn with the intention of seeing this bird though it, and/or others, are never there when I'm there. That said, there is always a good chance of finding waders here so no visit is wasted.
Buff-breasted Sandpiper breeds in nothern Canada and Alaska and winters in Argentina in the pampas grasslands. They are annual visitors to Cornwall and hardly a blank year goes by. This autumn there has been records from all over Europe so there must have been a job-lot displaced whilst migrating south from their breeding grounds.