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Aeshna isoceles
''Aeshna isoceles'' is a small hawker dragonfly that is found in Europe, mostly around the Mediterranean, and the lowlands of North Africa. Its common name in English is green-eyed hawker. In Britain it is a rare and local species and is known as the Norfolk hawker. It has a brown colour with green eyes and clear wings and also a yellow triangular mark on the second abdominal segment which gave rise to its scientific name. It used to be in the genus ''Anaciaeschna'' as it has several differences from the other members of the ''Aeshna'' genus. Its specific name is often spelt ''isosceles''.
==Identification==
''A. isoceles'' is one of only two brown hawkers found in Europe, the other is ''A. grandis''. Both have a brown thorax and abdomen but ''A. isoceles'' has green eyes and clear wings and a diagnostic yellow triangular mark on the second abdominal segment. The hindwings have an amber patch at their base. In contrast ''A. grandis'' has yellowish wings and blueish eyes. The green eye of ''A. isoceles'' stand out even in flight and in practice it is not difficult to tell these two dragonflies apart. In addition to the morphological differences ''A. isoceles'' is on the wing much earlier in the year than ''A. grandis''.
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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