EN
A Whiskered Tern in the first winter plumage was observed in winter 2017/2018 (1 and 9 Jan 2018) at the unfrozen Siemianówka reservoir (Narewka community, Podlasie Province, NE Poland). In previous years the species was noted twice in December, both times in Eastern Poland. These records are the first known attempts of the Whiskered Tern wintering in Poland. The number of autumn (October–November) records of juveniles of the species has also been increasing in last years in Poland.