''Byasa dasarada'', the great windmill, is a

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

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

that belongs to the windmills

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

, ''

Byasa Red-bodied swallowtails, or ruby swallowtail (due to the color), are butterflies in the swallowtail family, that belong to the genera ''Atrophaneura'', ''Byasa'', ''Losaria'', or ''Pachliopta''. They are generally found in Asia (Indomalayan rea ...

'', comprising tailed black swallowtail butterflies with white spots and red submarginal crescents.

Range and status

Northern India,

Nepal Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked country in South Asia. It is mainly situated in the Himalayas, but also includes parts of the Indo-Gangetic Plain. It borders the Tibet Autonomous Region of China Ch ...

Bhutan Bhutan, officially the Kingdom of Bhutan, is a landlocked country in South Asia, in the Eastern Himalayas between China to the north and northwest and India to the south and southeast. With a population of over 727,145 and a territory of , ...

Myanmar Myanmar, officially the Republic of the Union of Myanmar; and also referred to as Burma (the official English name until 1989), is a country in northwest Southeast Asia. It is the largest country by area in Mainland Southeast Asia and has ...

, south-eastern

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 ...

(including Hainan island (

Guangdong ) means "wide" or "vast", and has been associated with the region since the creation of Guang Prefecture in AD 226. The name "''Guang''" ultimately came from Guangxin ( zh, labels=no, first=t, t= , s=广信), an outpost established in Han dynasty ...

province)). The great windmill is not rare or threatened.

Subspecies

There are five

subspecies In Taxonomy (biology), biological classification, subspecies (: subspecies) is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (Morphology (biology), morpholog ...

. The following occur in the Indian neighbourhood: * ''B. d. dasarada''

Moore Moore may refer to: Language * Mooré language, spoken in West Africa People * Moore (surname) ** List of people with surname Moore * Moore Crosthwaite (1907–1989), a British diplomat and ambassador * Moore Disney (1765–1846), a senior ...

Sikkim Sikkim ( ; ) is a States and union territories of India, state in northeastern India. It borders the Tibet Autonomous Region of China in the north and northeast, Bhutan in the east, Koshi Province of Nepal in the west, and West Bengal in the ...

Assam Assam (, , ) is a state in Northeast India, northeastern India, south of the eastern Himalayas along the Brahmaputra Valley, Brahmaputra and Barak River valleys. Assam covers an area of . It is the second largest state in Northeast India, nor ...

. Not rare. * ''B. d. ravana''

Kashmir Kashmir ( or ) is the Northwestern Indian subcontinent, northernmost geographical region of the Indian subcontinent. Until the mid-19th century, the term ''Kashmir'' denoted only the Kashmir Valley between the Great Himalayas and the Pir P ...

to Kumaon. Not rare. * ''B. d. barata''

Rothschild Rothschild () is a name derived from the German ''zum rothen Schild'' (with the old spelling "th"), meaning "to the red shield", in reference to the houses where these family members lived or had lived. At the time, houses were designated by signs ...

. Rare.

Description

* Wingspan: 100 to 140 mm. * The butterflies resemble the common windmill but are usually larger with broader tails. * The upper hindwing marginal crescent is white or cream-coloured. * Sexes similar. The female often has a complete discal band of white spots on the hindwing. The butterfly is considered to be beautiful in appearance.

Habits

The great windmill is a woodland butterfly. It can often be spotted slowly and gracefully flying across clearings. It flies between in the spring and summer. Its habits resemble those of the common windmill.

Life cycle

Egg

Not described.

Larva

The ground colour of the larva varies in shades of grey and has a pattern of black lines. It has an orange

osmeterium The osmeterium is a defensive organ found in all papilionid larvae, in all stages. The organ is situated in the prothoracic segment and can be everted when the larva feels threatened. The everted organ resembles a fleshy forked tongue (not unlik ...

. The larva has a large number of

tubercle In anatomy, a tubercle (literally 'small tuber', Latin for 'lump') is any round nodule, small eminence, or warty outgrowth found on external or internal organs of a plant or an animal. In plants A tubercle is generally a wart-like projectio ...

s arranged in two lateral and two sub-dorsal rows. The third and fourth segments have an additional pair of tubercles. The tubercles all have red tips, except those on the seventh and eighth segments which are almost entirely dirty white and the eleventh segment which has the same colour on just the tips of the tubercles.

Pupa

Pupa is yellow green with blue bands. It has an orange protuberance on its back. It is attached to its support by a black body and anal pad. The pupa emits a squeak when touched.

Food plant

* '' Aristolochia griffithi''

Gallery

Image:Great Windmill Atrophaneura dasarada at Samsing, Duars, WB W IMG 6491.jpg, ''B. d. dasarada'' at

Samsing Samsing is a small hill village and tourist spot in the Matiali (community development block), Malbazar subdivision of Jalpaiguri district of West Bengal situated at an elevation of 3000 ft in the foothills in between Jalpaiguri and Dar ...

in Darjeeling district of West Bengal, India

References

* * * *

External links

Global Butterfly Information System

Lectotype In biology, a type is a particular specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally associated. In other words, a type is an example that serves to anchor or centralizes ...

text, images Byasa Butterflies of Asia Butterflies described in 1857 Taxa named by Frederic Moore {{Papilionidae-stub