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The banded demoiselle (''Calopteryx splendens'') is a species of damselfly belonging to the family Calopterygidae. It is often found along slow-flowing streams and rivers. It is a Eurasian species occurring from the Atlantic coast eastwards to Lake Baikal and northwestern China. ==Identification== This is a large damselfly with a total length of up to and a hindwing length of up to . The male has translucent wings which each have a broad, dark iridescent blue-black spot (or band) across the outer part. On immature dragonflies the spot is dark brown. The body can be a metallic blue or bluish green or a combination of both colours, depending on the time of year and location. The dark wing patch of the male starts at the nodus (the slight dip midway down the upper edge of the wing) but can reach up to the wing-tip in southern races.〔 In the very similar species ''C. virgo'' (beautiful demoiselle), the dark starts before the nodus. The female has translucent, pale green iridescent wings with a white patch near the tip (a pseudopterostigma), and a metallic green metallic bronze/green body. 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「banded demoiselle」の詳細全文を読む スポンサード リンク
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