The identification of small waders can be tricky: plumages vary according to age and time of year, with breeding, non-breeding, juvenile and intermediate stages. Learning to know each species by 'jizz' is important, and the ubiquitous Dunlin Calidris alpina is a useful yardstick. Indeed, lone, juvenile Dunlins are traps for the unwary. Identification of the mystery bird is complicated by the hi

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