Kyliiske Mouth is part of the Danube Delta near the Romanian border. It comprises numerous channels, swamp areas, floodplain forests, freshwater lakes and sandy spits enclosing bays. It was originally designated in 1976 by the Soviet Union as part of the Site “Danube Delta and Tendrov/Yagorlitz Bays”. In 1995, after accession of Ukraine, that Site was split into three: Kyliiske Mouth, Yagorlytska Bay (Ramsar Site no.116) and Tendrivska Bay (Site no.768). In 2021 the boundary of Kyliiske Mouth was extended and delineated more accurately, increasing the total area by 12,100 hectares. The vegetation includes hydrophilic communities, reed and sedge marshes and dune communities. The Site provides habitat for large numbers of wintering, migrating, breeding and moulting waterbirds, as well as favourable environments for many fish and amphibians. More than one percent of the respective populations of the pelican species Pelecanus onocrotalus and Pelecanus crispus visit the Site. Since 2009 large-scale restoration works have been carried out, with dams removed to recover important habitats on an island within the river mouth. Human activities include fishing, livestock grazing, reed harvesting and recreation. Water is used for irrigation of rice paddies, aquaculture and household needs by the nearby town of Vilkove.