Birds that only visit UK gardens in winter

Redwings and fieldfares arrive from Scandinavia in autumn and leave in spring. Both are thrushes, both come for berries and windfall fruit rather than feeders, and both usually turn up in flocks.

2 of the 30 birds on this site fit. Each one links to its full page, with what separates it from the ones it gets mistaken for.

Not here? Describe what you saw — the identifier ranks every garden bird rather than filtering them out, so it will not hide yours.