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

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

(from

Hokkaidō is Japan's second largest island 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 the undersea railway Seikan Tunnel. The la ...

to Tanegashima), Korean Peninsula,

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...

, Taiwan, and Indochina.

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

Humulus japonicus ''Humulus japonicus'', known as Japanese hop, 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 i ...

'', 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 {{Nymphalinae-stub