Modern structure of avifauna of the Stavropol upland forests and its changes for the last 45 years

Researches carried out in 2003-2010 showed that the avifauna of the Stavropol Upland forests for the period from 1965-1975 until 2005-2010 has undergone significant changes that have occurred in the following directions: the increase in number of nesting species by invasion of Caucasian dendrophilous forest forms; loss of stock or downsizing of dendrophilous steppe forms;) transformation of the avifauna structure etc.