Medium sized damselfly, the mature form flies during rain season, they
have been known as a common species in South East Asia .
The teneral form has black synthorax marking with dusk yellow marking but it
change into dull black in mature form. The fore-wings of male are hyaline and
its hind-wings are hyaline with black spot at 1/3 apex. In female, wings are
brownish hyaline.
They found at running clean streams in dark or open forests, they
usually perch on stones just above water surface or branch of trees 1-3 m above
water level. As perching, they some time open or clap the wings (both pair of
wings or just hind wings) in sunshine. The males usually fight each other for
protecting their territory and mate with coming females which often rest at
higher above.
Male, photo by Cuong Do, Ba Vi National Park
Male in opened wings position, photographed by Cuong Do, Tam Dao National Park
Male, photographed by Cuong Do, Tam Dao National Park
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