Study on species and conservation priority of butterflies in Dong Van Karst Plateau, Ha Giang province was carried out in forests of Lung Cu, Pho Bang, Ta Phin and sites near Dong Van town. The habitats are the natural forest on mountain, the secondary forest, the forest edge, shrub and grass ftom 1,400 to 1,700 m a.s.l. The study was carried out uncontinuously ftom May to September in 2008,2010 and 2011. Total 132 species of5 butterfly families were recorded during studied period. Two species listed in the Red Data Book of Vietnam and CITES are Troides aeacus and Teinopa/pus imperialis. There are 33 species with individuals 1-2 (25 percent of all species), 44 species with individuals 3-5 (33 percent of all species), 14 species with individuals 6-10 (11 percent of all species), and 41 species with individuals more than 10 (31 percent of all species). Butterfly species of Dong Van karst plateau consists of 12.6 percent of all butterfly species of Vietnam, but the family Papilionidae of Dong Van karst plateau consists of 40 percent of all species of the family of Vietnam. The family Papilionidae is very important for conservation of insects. Some species distributed in Vietnam merely found in the studied area are Byasa hedistus, Papilio elwesi, Sasakia fimeblis. S. charonda, and Melitaea yuenty. These species are rare and distribute in forests where forests are being declined. So it is needed conservation measures to conserve, especially conserve the natural forests in Dong Van karst plateau, the habitat of these butterflies.
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