title: Short Database &amp;#39;Alien Bird Species in the Fauna of Ukraine&amp;#39; v1
abstract: In recent decades, there has been a shift in the ranges of species in different territories. The distribution of birds is influenced by a variety of factors, with the initial position of the primary centre of origin of the species being the most important (Payevsky 2015). Changes in the species composition of the fauna of many regions are associated with an increase in the abundance of some species and with climatic and anthropogenic changes. The primary impact factor driving the range expansion