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Sympecma fusca
''Sympecma fusca'', the common winter damselfly, is a damselfly that is found in much of central and southern Europe. It does not have the bright blue or red colouration that is more usual for damselflies so it is often overlooked. It is one of only two species of European dragonflies that overwinter as adult insects, the other being the related ''S. paedisca''. It is a member of the Lestidae and related to the emeralds or spreadwings.
==Description==
Although related to the ''Lestes'' 'spreadwing' damselflies, ''Sympecma'' rest with their wings alongside their bodies and do not have the metallic emerald green sheen that is characteristic of the ''Lestes''. ''Sympecma'' have pale brown pterostigma on both forewing and hindwing and the pterostigma are nearer the wing tip on the forewing which means that both pterostigma can be seen — they do not overlap as in other damselflies. In the field this is easily seen and distinguishes ''Sympecma'' from all other damselflies. ''S. fusca'' is a nondescript damselfly that blends in with the dried grass stalks in which it overwinters but it is distinct from all other European damselflies except ''S. paedisca'', so in most of its range there are no problems with identification. Where both ''S. fusca'' and ''S. paedisca'' fly together careful examination of the adult, in the hand, preferably under magnification, is required to tell the two species apart. In the male the anal appendages are slightly different and there are subtle differences in the markings on the thorax in both sexes.
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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