In the Octomber 2004 – June 2007 period, a number of 188 bird species belonging to 16 orders and 47 familys were observed in the wet zones from the middle course of the Siret river. The _ertain specific diversity has been found in the habitats created by artificial lakes-172 species. The most reduced diversity was found in the habitats created were found 118 species.The main reson this phenomenon is the fact that the barrage lakes are offering more importante food source and protection, because of the intensive clog.