Just a quick response to Mark Spirito's post earlier today. Many years ago I lived at Wallog, north of Clarach. From the end of April until well into August Manxies were regularly heard overhead. Some nights it seemed that one bird was flying around the house! We scoured the slopes just inland for occupied burrows without any success, so eventually had to conclude that they may have been young birds "practising" for their adult years on one or other of the Welsh islands.