Memorandum of Understanding on the Conservation of Southern South American Migratory Grassland Bird Species and their Habitats (Aug. 26, 2007) Countries/Territories Entry into force Simple signature Argentina Aug 26, 2007 Aug 26, 2007 Brazil Aug 27, 2007 Aug 27, 2007 Paraguay Aug 26, 2007 Aug 26, 2007 Uruguay Aug 26, 2007 Aug 26, 2007 Bolivia (Plurinational State of) Sep 23, 2009 Sep 23, 2009