Blank Swift is a rare butterfly found in hill country above 300ft (Woodhouse L.G.O, 1950). Ormiston recorded it from Haldummulla and hills above Rathnapura and Woodhouse from Corbet's gap[most months of the year] and Madugoda [plentiful in March and Apri] (Woodhouse L.G.O, 1950 & Ormiston W., 1924). Above photograph was taken at Sinharaja World Heritage site (~1700ft a.s.l). Its larva feeds on Davidsea attenuata and also Bambusa multiplex only when offered.
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