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''Glaucopsyche lygdamus'', the silvery blue, is a small butterfly native to North America. Upperside is a light blue in males, a dull grayish blue in females. Underside is gray with single row of round spots of differing sizes depending upon region. ''G. lygdamus'' is found over much of the western United States and most of Canada extending north excepting most of Nunavut and the high Arctic islands. Wingspan is from 18 to 28 mm.〔Jim P. Brock and K. Kaufman. Kaufman Field Guide to Butterflies of North America, New York, NY:Houghton Mifflin, 2003.〕〔 ==Similar species== *Eastern tailed-blue (''Cupido comyntas'') has small 'tails' on hindwings *Western tailed-blue (''Cupido amyntula'') has small 'tails' on hindwings *Arrowhead blue (''Cupido piasus'') *Greenish blue (''Plebejus saepiolus'') has two rows of small black spots on the underside of both wings〔(Silvery Blue ), Butterflies of Canada〕 *Boisduval's blue (''Icaricia icarioides'') has two rows of small black spots on the underside of both wings〔 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「Glaucopsyche lygdamus」の詳細全文を読む スポンサード リンク
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