EN
Synurbization of the Grey Heron has been described from Western Europe, but urban colonies of the species have been rarely reported from Poland. One of the urban Polish breeding colonies is located in Wrocław, Lower Silesia, where the species has nested since 1994. At the end of April 2019 we counted a total of 204 breeding pairs. This colony is divided into two subcolonies with 104 and 100 nests, respectively. The main nesting tree is the Black Pine Pinus nigra. The most likely the number of breeding pairs within the colony is increasing.