''Byasa nevilli'', the Nevill's windmill, is a butterfly found in India that belongs to the windmills genus (''

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 ...

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

Range

North east India ( Assam),

Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John C. Wells, Joh ...

(Shan states) and western

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 ...

Status

It is very common in western China and very rare in India. This butterfly is protected in India though it is not known to be threatened.

Taxonomy

No separate subspecies have been described.

Description

The wingspan is 100–120 mm. In appearance it is similar to the

great windmill ''Byasa dasarada'', the great windmill, is a butterfly found in India that belongs to the windmills genus, ''Byasa'', comprising tailed black swallowtail butterflies with white spots and red submarginal crescents. Range and status Northern Indi ...

(''Byasa dasarada''), but is smaller. The tail is not red-tipped. It also resembles the great windmill subspecies ''B. d. ravana'', Moore, but is smaller, with the markings also proportionately smaller. The male differs as follows: the subterminal series of lunules on the hindwing are crimson or vermilion red, never white or partly white as in ''B. d. ravana''; sexual abdominal fold within white, not blackish brown; the subterminal red lunule in interspace 3 very often missing. Female resembles the male rather than the female of ''B. d. ravana'' but the white rectangular markings in interspaces 5 and 6 are whiter. From ''B. d. ravana'' female it differs in the complete absence of the white discal spots in interspaces 1, 2, 3 and 4. In both sexes the tail is black without any red spot.

Notes

References

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External links

Global Butterfly Information System
- Text, images including holotype of ''chentsong'' Oberthür, 1886 and type information on ''stenoptera'' Chou & Gu, 1994 Byasa Butterflies of Asia Taxa named by James Wood-Mason Butterflies described in 1882 {{Papilionidae-stub