The arcane world of falconry is infamous for a snobbery that dates back to the medieval period, when different raptors were pegged to a hierarchical list of feudal stations. So the noble peregrine was for princes, the dainty merlin was milady’s bird, and – as we know from Barry Hines’s novel – it was just a kestrel for a knave. The northern goshawk, however – the largest and most...