This is quite correct in terms of finding Nickell's explanation facile. At this point I'd like to doff my virtual hat to
@Comfortably Numb and the much-missed
@EnolaGaia for their incredible work on this thread in terms of digging out sources, testing hypotheses and showing that the case was very much more complex than often assumed these days. I do wonder if Smith has read this thread; it's a real goldmine.
Personally I think the 'owls' explanation is blown out of the water by the fact that it's predicated on the birds defending a 'nest' they'd probably have long lost interest in by that point of the year, but there are plenty of other reasons for disregarding it.