Roy,
It is not particularly unusual for summer migrants to return in successive years to their place of origin. First year birds normally return to the same general area, whilst returning adults may well return to the same tree, bush or nestbox that they nested in the previous year. We have even found Swifts subsequently nesting in the same house that they were reared in, remarkable when you consider that when a Swift leaves the nest, it heads straight off southwards and spends no time 'around the nest' like other species. It is this amazing navigational ability that small birds have, that made me become so interested in ringing birds. Very good to hear of a returning Spotted Flycatcher though, as they seem to becoming very scarce these days.
Alan
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