|
The common darter (''Sympetrum striolatum'') is a dragonfly of the family Libellulidae native to Eurasia. It is one of the most common dragonflies in Europe, occurring in a wide variety of water bodies, though with a preference for breeding in still water such as ponds and lakes. In the south of its range adults are on the wing all year round. ==Appearance== ''Sympetrum'' species are not easy to tell apart and in most areas more than one ''Sympetrum'' species will occur. Females and teneral individuals have light yellow thorax and abdomen. Males turn red as they mature. Females darken with age, becoming a dark chocolate brown, and sometimes develop a blue colouration to the bottom of the abdomen. The wings also develop a brown tinge with age. In all cases the legs have a cream or yellow stripe on a black background - this is a diagnostic feature of this species. The pterostigma of the females can be red, blue, pale blue or brown. Common darter dragonfly (Sympetrum striolatum) immature male.jpg|immature male Common darter dragonfly (Sympetrum striolatum) mature male.JPG|mature male Common darter dragonfly (Sympetrum striolatum) female yellow abdomen and blue pterostigma.jpg|female (yellow abdomen and blue pterostigma) Common darter dragonfly (Sympetrum striolatum) female yellow abdomen and brown pterostigma.jpg|female (yellow abdomen and brown pterostigma) Common darter dragonfly (Sympetrum striolatum) female head.jpg|female Common darter dragonfly (sympetrum striolatum) mature female red abdomen.jpg|mature female (red abdomen) Common darter (Sympetrum striolatum) mature female.jpg|mature female (brown abdomen) 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「Common darter」の詳細全文を読む スポンサード リンク
|