Rare birds of the South of the Karelian isthmus
Fauna of rare birds in recreation zone of Southe of Karelian Istmus at the beginning of XXI century is investigated. It is shoun that birds fauna content with unstable number – horologic status much higher in comparison withit in the 2-nd half of XX-th century. The main reasons for that are even age structure of forests, not supported biodiversity of ecosistems, deal with modern cutting system low number of hollows in the forest stands and permanent factor of disturbance.