Have you ever tried to creep up on a cuckoo? I’ve tried repeatedly over the years but it’s nigh on impossible. I suspect even the SAS would struggle. Cuckoos are impossibly flighty, and somehow also evade being precisely pinpointed by your ear. A vague direction can be discerned, but when you think you’re getting close, the call suddenly seems to come from another direction entirely. It could be another cuckoo of course, but more often than not, your target cuckoo has simply taken flight and moved to a new location. You didn’t see it move because….well….what would that even look…