Nevill's Windmill Byasa nevilli is a beautiful butterfly found in India that belongs to the Windmills genus Byasa, comprising tailed black swallowtail butterflies with white spots and red submarginal crescents.
Very common in western China. Very rare in India. Protected in India though it is not known to be threatened.
No separate subspecies have been described.
- Wingspan : 100 - 120mm.
- Similar to the Great Windmill, but is smaller. The tail is not red-tipped.
Resembles Byasa dasarada ravana, Moore, but is smaller, with the markings also proportionately smaller, male differs as follows :— the subterminal series of lunules on the hind wing crimson or vermilion-red, never white or partly white as in 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 ravana but the white rectangular markings in interspaces 5 and 6 are whiter. From A. 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.
- Häuser, Christoph L.; de Jong, Rienk ; Lamas, Gerardo ; Robbins, Robert K.; Smith, Campbell & Vane-Wright, Richard I. (28 July 2005). "Papilionidae – revised GloBIS/GART species checklist (2nd draft)". Entomological Data Information System. Staatliches Museum für Naturkunde Stuttgart, Germany. Retrieved 21 June 2013.
- Bingham, C. T. 1907. Fauna of British India. Butterflies. Volume 2
- Collins, N.M. & Morris, M.G. (1985) Threatened Swallowtail Butterflies of the World. IUCN. ISBN 2-88032-603-6
- Evans, W.H. (1932) The Identification of Indian Butterflies. (2nd Ed), Bombay Natural History Society, Mumbai, India
- Haribal, Meena (1994) Butterflies of Sikkim Himalaya and their Natural History.
- Wynter-Blyth, M.A. (1957) Butterflies of the Indian Region, Bombay Natural History Society, Mumbai, India.
- List of butterflies of India
- List of butterflies of India (Papilionidae)
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