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This is a list of butterflies of Thailand. About 1,100 species are known from Thailand.

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Bassarona teuta, the banded marquis, is a species of nymphalid butterfly.

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Euthalia aconthea, the common baron, often called simply baron, is a medium-sized nymphalid butterfly native to Sri Lanka, India and southeast Asia. It flies with stiff wing beats and often glides. The wing is not flapped very far below the horizontal.

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Euthalia monina, the powdered baron or Malay baron, is a species of nymphalid butterfly. The species was first described by Frederic Moore in 1859.

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Euthalia telchinia, the blue baron, is a species of nymphalid butterfly found in South and Southeast Asia. It was first described by Édouard Ménétries in 1857.

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Neptis omeroda is a species of nymphalid butterfly found in Asia.

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Papilio pitmani is a species of swallowtail butterfly from the genus Papilio that is found in Burma, Thailand and Vietnam.

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Papilio prexaspes, the blue Helen, is a swallowtail butterfly found in Southeast Asia. The race found in the Andaman and Nicobar Islands, Papilio prexaspes andamanicus, is also known as the Andaman Helen.

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Zizeeria karsandra, the dark grass blue, is a small butterfly first described by Frederic Moore in 1865. It is found from the southern Mediterranean, in a broad band to India, Sri Lanka, the Andaman and Nicobar islands, Myanmar, Thailand, Malaysia, Yunnan, Indonesia, the Philippines, Arabia, United Arab Emirates, Saudi Arabia and Oman, New Guinea and northern and eastern Australia. It belongs to the lycaenids or blues family, and the tribe Polyommatini.