Lesser Whitethroats Curruca curruca are regularly caught at Norfolk Ornithologists’ Association’s Holme Bird Observatory, but all birds ringed to date have occurred between April and November (fig. 1). Both November records had, by means of DNA samples, been shown to be ‘Siberian Lesser Whitethroats’ C. c. blythi. Therefore, a bird that was caught and ringed on 2nd January 2023 immediately piqued our attention.