European Serin (Serinus serinus) expands nesting area to south and east

In the context of anthropogenic and climatic changes in the faunas of numerous regions, species that were previously absent from there are now observed, accompanied by alterations in the number of animal populations and disruption of the usual trends of their dynamics. The changes in the range of the European Serin (Serinus serinus) within Ukraine were identified by creating a four-layer GIS map in the DIVA-GIS software. The analysis revealed that European Serin continues to disperse in Europe, with a notable shift towards the south and east. The current southern border of the breeding range of the species passes through Central Ukraine, encompassing the right bank of the Dnipro river. However, the status of European Serin in the Black Sea region remains unclear. In the territories inhabited in the 20^th century, the density of European Serin in the breeding season has increased, although decreasing population size is described for old populations of Europe. It is relevant to study the comparative dynamics of bird numbers in old habitats and in newly developed areas, with a view to identifying new wintering grounds for birds and populations that have shifted to a sedentary lifestyle.