“OMPO Vilnius” since 1999 coordinated and implemented several international environmental programs in Lithuania and in the neighbouring countries (“Inventory of Important Wetlands in Lithuania” (1999-2002), “Conservation of biodiversity in the Nemunas River delta” (2000-2003), “Biodiversity in fishponds of Belarus and Lithuania” (2000-2001), “Important transboundary wetlands shared by Lithuania-Belarus and Lithuania-Russia” (2001-2003), etc., and in the Central and Eastern Europe (“Population Status of Snipes in the Eastern Baltic Region” (1999-2002), “Changes of the Wintering Sites of Waterfowl in Central and Eastern Europe” (1999-2001), “Bird Migration and Avian Influenza in Eastern Europe” (2006-2008), “Restoration of internationally important floodplains for waterbirds shared by Lithuania, Belarus and Russia” (2012 – 2015), “Duck populations in Eastern Europe” (2008 – 2017) and others.

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Since 2007 the Public Organization “OMPO Vilnius” participated in several major programs funded by the EU Commission and was responsible for their administration (“Conservation of Biodiversity in the Cross-border Lake Druksiai shared by Lithuania and  Belarus”, 2007-2008, “Environmental Impact Assessment of the Visaginas Nuclear Power Station”, 2009, “Conservation and Management of Vulnerable Great Snipe Population”, 2010, “Designation of the cross-border Adutiskis/Vileity Ramsar Site”, 2010-2011). It was also responsible for coordination of certain activities of the major UNEP/GEF Program “Wings over Wetlands” implemented in the Nemunas River delta in 2007-2010.

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Results of these programs were compiled in several publications published by “OMPO Vilnius” and reported in certain key international conferences (European Conferences of Convention on Wetlands, Bled, 2000, Yerevan, 2004; Global Conference of Convention on Wetlands, Valencia, 2002; Conferences of Ornithological European Society, 2000, 2002, 2006; IUCN Global Conference, 2004, Bird Migration and Global Change Conference, 2010, IUGB Congress 2010, 2014, etc.).

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“OMPO Vilnius” has arranged 7 major international conferences related to migratory birds and their habitats in Central and Eastern Europe.