Mnais is a genus of broad-winged damselflies, known as copperwings, in the family Calopterygidae. The genus was described by the Belgian entomologist Edmond de Sélys Longchamps in 1853. There are 15 described species in Mnais.

Distribution Mnias damselflies are found primarily in eastern Asia.

Biology and Behaviour Adult male Mnais occur in two genetically determined wing morphs, orange-winged and clear-winged, controlled by a single locus. Orange-winged males tend to be territorial and defend oviposition sites, while clear-winged males are typically non-territorial and perch nearby to intercept females .

Species These 15 species belong to the genus Mnais:

Mnais andersoni McLachlan in Selys, 1873 Mnais auripennis Needham, 1930 Mnais costalis Selys, 1869 Mnais decolorata Bartenef, 1913 Mnais esakii Asahina, 1976 Mnais gregoryi Fraser, 1924 Mnais icteroptera Fraser, 1929 Mnais incolor Martin, 1921 Mnais maclachlani Fraser, 1924 Mnais mneme Ris, 1916 Mnais pieli Navas, 1936 Mnais pruinosa Selys, 1853 Mnais semiopaca May, 1935 Mnais tenuis Oguma, 1913 Mnais yunosukei (Asahina, 1990)

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