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One in five migratory species is threatened with extinction and 44 per cent have a decreasing population trend, according to the United Nations' first 'State of the World's Migratory Species' report released on Monday. The situation is far worse in aquatic ecosystems, with 97 per cent of the migratory fish listed for protection under the Convention on Migratory Species (CMS) at risk of extinction. Established in 1979, the CMS focuses on bringing countries and stakeholders together to agree on the actions needed to ensure that migratory species survive and thrive. According to the report, 82 per cent of the species listed under Appendix I of the convention are threatened with extinction and 76 per cent have a declining population trend. Eighteen per cent of Appendix II species are globally threatened, with almost half (42 per cent) showing decreasing population trends. The convention's Appendix I lists migratory species which are endangered. Appendix II lists migratory species "wh