Chinese Windmill Byasa plutonius is a butterfly found in Asia that belongs to the Windmills, genus Byasa, comprising tailed black swallowtail butterflies with white spots and red submarginal crescents.
The two subspecies in the Indian sub-continent have the common names of Pemberton's Windmill and Tytler's Windmill.
A rare species of high elevations, two subspecies are protected in India -
- B. p. pembertoni, Pemberton's Chinese Windmill .
- B. p. tytleri, Tytler's Chinese Windmill.
These names may be contracted to Pemberton's Windmill and Tytler's Windmill.
It has three subspecies.
- Wingspan : 100 - 120mm.
- Tail black in both sexes.
- Male - Above, brownish black and unmarked except for a row of markings.
- Pemberton's Windmill (Sikkim-Bhutan) - This row from veins 2 to 6 on the upper hindwing consists of whitish marginal spots.
- Tytler's Windmill (Manipur, Naga and Chin hills) - This row consists of prominent black marginal spots on the upper hindwing and small red spot in vein 2.
- Female - Above, paler. The female has traces of red lunules on the margins from veins 3 to 6 on the upper hindwing.
- 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.
- Collins, N.M. & Morris, M.G. (1985) Threatened Swallowtail Butterflies of the World. IUCN. ISBN 978-2-88032-603-6 pdf
- 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.
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