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citrine forktail
The Citrine forktail, ''Ischnura hastata'', is a damselfly of the family Coenagrionidae.
==Description==
This species is 20–27 mm in length, and its hindwing is 11–15 mm long; it is thus considerably smaller than most European members of the genus ''Ischnura''.
Adult males have a black head and thorax, with blue markings, and a largely yellow abdomen, with black markings on its upper surface. The term citrine refers to its yellowish colouration. Adult females are initially largely orange, marked with black above on the head and rear part of the abdomen. They undergo a colour change, through brown or olive to greyish, as they mature.
Male Citrine Forktails are the only damselflies in the world with the pterostigma situated away from the leading edge of the wing.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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