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The Common Sailer (''Neptis hylas'') is a species of nymphalid butterfly found in the Indian Subcontinent and Southeast Asia. It has a characteristic stiff gliding flight achieved by short and shallow wingbeats just above the horizontal. ==Description== Dry-season form - Upperside black, with pure white markings. Fore wing discoidal streak clavate, apically truncate, subapically either notched or sometimes indistinctly divided; triangular spot beyond broad, well-defined, acute at apex, but not elongate; discal series of spots separate, not connate, each about twice as long as broad; postdiscal transverse series of small spots incomplete, but some are always present. Hind wing: subbasal band of even or nearly oven width ; discal and subterminal pale lines obscure; postdiscal series of spots well separated, quadrate or subquadrate, very seldom narrow. Underside from pale golden ochraceous to dark ochraceous almost chocolate ; white markings as on the upperside, but broader and defined in black. Fore wing: interspaces 1 a and 1 from base to near the apex shaded with black, some narrow transverse white markings on either side of the transverse postdiscal series of small spots. Hind wing a streak of white on costal margin at base, a more slender white streak below it; the discal and subterminal pale lines of the upperside replaced by narrow white lines with still narrower margins of black. Antennae, head, thorax and abdomen black; the palpi, thorax and abdomen beneath dusky white. Wet-season form - Differs only in the narrowness of the white markings and in the slightly darker ground-colour and broader black margins to the spots and bands on the underside.〔Bingham, C.T. (1905). ''Fauna of British India. Butterflies.'' Volume 1〕 File:Neptishylas.jpg|Upperside on right. Underside left File:Neptis hylas 2.jpg|Mating pair, Bangalore, India File:Comon sailor.jpg|In Dumbara, Rathnapura, Sri Lanka File:Common_sailor_(Neptis_hylas_matuta)_Bali_I.jpg|''N. h. matuta'' Bali, Indonesia File:Common sailor (Neptis hylas matuta) underside Bali I.jpg|''N. h. matuta'' underside Bali, Indonesia This species has been observed to make sounds whose function has not been established.〔Scott, F.W. (1968). Sound produced by ''Neptis hylas'' (Nymphalidae). ''Journal of the Lepidopterists' Society'' 22(4):254 (PDF )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Neptis hylas」の詳細全文を読む スポンサード リンク
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