''Polygonia c-aureum'', the Asian comma, is a middle-size

butterfly Butterflies are winged insects from the lepidopteran superfamily Papilionoidea, characterized by large, often brightly coloured wings that often fold together when at rest, and a conspicuous, fluttering flight. The oldest butterfly fossi ...

found in

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

(from

Hokkaidō is the second-largest island of Japan and comprises the largest and northernmost prefecture, making up its own region. The Tsugaru Strait separates Hokkaidō from Honshu; the two islands are connected by railway via the Seikan Tunnel. The ...

Tanegashima is one of the Ōsumi Islands belonging to Kagoshima Prefecture, Japan. The island, in area, is the second largest of the Ōsumi Islands, and has a population of 33,000 people. Access to the island is by ferry, or by air to New Tanegashima Airp ...

Korean Peninsula Korea is a peninsular region in East Asia consisting of the Korean Peninsula, Jeju Island, and smaller islands. Since the end of World War II in 1945, it has been politically divided at or near the 38th parallel between North Korea (Dem ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

Taiwan Taiwan, officially the Republic of China (ROC), is a country in East Asia. The main geography of Taiwan, island of Taiwan, also known as ''Formosa'', lies between the East China Sea, East and South China Seas in the northwestern Pacific Ocea ...

, and

Indochina Mainland Southeast Asia (historically known as Indochina and the Indochinese Peninsula) is the continental portion of Southeast Asia. It lies east of the Indian subcontinent and south of Mainland China and is bordered by the Indian Ocean to th ...

Appearance

It has a wingspan of 27 mm. Wings are orange with black dots. The undersides of the wings is mottled brown (tree bark like) with a shiny comma mark on the center of the hindwing. The main difference with other comma species is that it has blueish markings on the bottom of its hindwing.

Ecology

''P. c-aureum'' is common in suburban areas. It is not a threatened species. The

larva A larva (; : larvae ) is a distinct juvenile form many animals undergo before metamorphosis into their next life stage. Animals with indirect development such as insects, some arachnids, amphibians, or cnidarians typically have a larval phase ...

e of the species feed on plants such as: ''

Humulus japonicus ''Humulus japonicus'', known as Japanese hops, is an ornamental plant in the family Cannabaceae. Some authorities have it as a synonym of ''Humulus scandens''. Originally native to East Asian countries such as China, Japan, Korea, and extending ...

'', the Japanese hop.

References

*Kazuo Unno et al., ''Hana-to chou-wo tanoshimu batafurai gāden nyūmon'', Nou-san-gyo-son bunka kyoukai, 15 June 1999, Nymphalini Butterflies described in 1758 Taxa named by Carl Linnaeus Butterflies of Indochina {{Nymphalinae-stub