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Field Trip Yuen Long 10-3-20

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丹桂村水磄
Crimson marsh glider ( Trithemis aurora ) 紫紅蜻蜓 The male of the species is distinctly different from the female. The male has a reddish-brown face, with eyes that are crimson above and brown on the sides. The thorax is red with a fine, purple pruinescence. The abdomen, the base of which is swollen, is crimson with a violet tinge. The wings are transparent with crimson venation and the base has a broad amber patch. The wing spots are a dark reddish-brown and the legs are black.
The female has an olivaceous or bright reddish-brown face with eyes that are purplish-brown above and grey below. The thorax is olivaceous with brown median and black lateral stripes. The abdomen is reddish-brown with median and lateral black markings. The black markings are confluent at the end of each segment and enclose a reddish-brown spot. The wings are transparent with brown tips. The venation is bright yellow to brown and basal amber markings are pale. The wing spots are a dark brown and the lags are dark grey with narrow yellow stripes.
Crimson marsh glider ( Trithemis aurora ) 紫紅蜻蜓
Great eggfly (Hypolimnas bolina) 幻紫斑蛺蝶
Dark-branded Bushbrown (Mycalesis mineus ) 小眉眼蝶 眼蝶科眉眼蝶属的一种蝴蝶。该蝶有春、夏型之分。
The common sailor ( Neptis hylas ) 中环蛱蝶 , is a species of nymphalid butterfly found in the Indian subcontinent and southeast Asia. It has a characteristic stiff gliding flight achieved by short and shallow wingbeats just above the horizontal.
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Posted on

Field Trip Yuen Long 10-3-20

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Great eggfly (Hypolimnas bolina) 幻紫斑蛺蝶
Crimson marsh glider (Trithemis aurora) 紫紅蜻蜓 The male of the species is distinctly different from the female. The male has a reddish-brown face, with eyes that are crimson above and brown on the sides. The thorax is red with a fine, purple pruinescence. The abdomen, the base of which is swollen, is crimson with a violet tinge. The wings are transparent with crimson venation and the base has a broad amber patch. The wing spots are a dark reddish-brown and the legs are black.
The female has an olivaceous or bright reddish-brown face with eyes that are purplish-brown above and grey below. The thorax is olivaceous with brown median and black lateral stripes. The abdomen is reddish-brown with median and lateral black markings. The black markings are confluent at the end of each segment and enclose a reddish-brown spot. The wings are transparent with brown tips. The venation is bright yellow to brown and basal amber markings are pale. The wing spots are a dark brown and the lags are dark grey with narrow yellow stripes.
Crimson marsh glider (Trithemis aurora) 紫紅蜻蜓
Great eggfly (Hypolimnas bolina) 幻紫斑蛺蝶
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Field trip Long Valley 9-26-20

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Net fishermen
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Male common mormon ( Papilio polytes ) 玉带凤蝶 is a common species of swallowtail butterfly widely distributed across Asia.
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Plain tiger, African queen, or African Monarch ( Danaus chrysippus ) 金斑蝶
a medium-sized butterfly with a wingspan of about 7–8 cm (2.8–3.1 in). The body is black with many white spots. The wings are orange, the upperside brighter and richer than the underside. The apical half of the forewing is black with a white band. The hindwing has three black spots in the center. The wings are bordered in black and outlined with semicircular white spots.
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Female great eggfly, common eggfly ( Hypolimnas bolina ) 幻紫斑蛱蝶
The upperside of the wings of the female is a brownish black and does not have any spots like those of the male. The edges bear white markings which are similar to those of the common Indian crow.
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Common picture wing or variegated flutterer (Rhyothemis variegata ) 斑丽翅蜻别名彩裳蜻蜓 is a species of dragonfly of the family Libellulidae, found in South Asia. It is a medium-sized dark bodied dragonfly with colorful wings tinted with pale yellow. There are a few black spots on the apices and nodes of the fore-wings. There is a large patch in the base of the hind-wings, marked with black and golden yellow. In females, the apical half of the fore-wings are transparent; basal half tinted with golden-yellow with black marks. The apical ends of the hind-wings are transparent; rest of wings marked with golden-yellow and black.
It breeds in marshes, ponds and paddy fields. They appear to have weak flight and can easily be mistaken for butterflies.
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Globe skimmer, globe wanderer or wandering glider ( Pantala flavescens ) 黄蜻 The dragonfly is up to 4.5 cm long, reaching wingspans between 7.2 cm and 8.4 cm. The front side of the head is yellowish to reddish. The thorax is usually yellow to golden coloured with a dark and hairy line. There were also specimens with a brown or olive thorax. The abdomen has a similar colour as the thorax.
The wings are clear and very broad at the base. There, too, there are some specimens with olive, brown and yellow wings.
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Slender skimmer or green marsh hawk ( Orthetrum sabina ) 狭腹灰蜻
It is a medium-sized dragonfly with a wingspan of 60-85mm. Adults are grayish to greenish yellow with black and pale markings and green eyes. Its abdomen is greenish-yellow, marked with black.