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分布

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本種廣泛分布印度、東南亞及中國華南,台灣本島主要分布在嘉義以南低海拔地區,其它地區紀錄較少。
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描述

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雄蟲全長59-62 mm,雌蟲全長56-58 mm。 臉部黃褐色,上額淡綠色有模糊的淡褐色T字斑,複眼淡藍色,合胸淡綠色,腳黃褐色。腹部深褐色,斑紋淡綠色,第二節人面紋額斑與唇斑模糊,眼斑細橫紋狀,鼻斑縱細紋狀,前後各與額斑及唇斑相接;第三~七節背面各有四個一組前後相連的模糊斑紋,其中的背中斑細橫紋狀。雄蟲攫握器深褐色,上攫握器細直而短,約與第九+十節等長。
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棲地

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本種廣泛分布印度、東南亞及中國華南,台灣本島主要分布在嘉義以南低海拔地區,其它地區紀錄較少。成蟲在本島南部幾乎全年可見,常出現在濕生演替後期的草澤地周圍,有濕泥地環境的農墾地或山區溪流也有零星紀錄。傍晚時分常於草叢或短草地低空來回飛行覓食,白天大多躲藏在樹林間。
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Gynacantha bayadera

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Gynacantha bayadera,[2] parakeet darner[3] or small duskhawker,[4] is a species of dragonfly in the family Aeshnidae. It is found from India to South China and northern New Guinea. This is a crepuscular species which probably breeds in forested swamps and marshy areas, or in forest pools.[5][1]

Description and habitat

This is a slender dragonfly with abdomen constricted at the 3rd segment and colored a uniform parakeet green, sometimes turning olivaceous. Its thorax is green and abdomen is pale brown to reddish brown above with segments 1–3 grass green on the sides.[6][3] It can be distinguished from other Gynacantha species as it has unmarked frons whereas Gynacantha dravida, Gynacantha basiguttata and Gynacantha subinterrupta have a "T-mark".[7][4]

Fraser described Gynacantha millardi which resembles G. bayadera in its size, shape and colors. But it can be differentiated by the absence of the usual constriction of segment three which is very prominent in G. bayadera.[8] G. millardi is considered as a synonym of G. bayadera in some literature[5] and as a good species in some others.[2][9][10]

It is crepuscular and flies low in shady places.[6]

See also

References

  1. ^ a b Mitra, A. (2020). "Gynacantha bayadera". IUCN Red List of Threatened Species. 2020: e.T167060A188883207. doi:10.2305/IUCN.UK.2020-3.RLTS.T167060A188883207.en. Retrieved 20 November 2021.
  2. ^ a b Paulson, D.; Schorr, M.; Abbott, J.; Bota-Sierra, C.; Deliry, C.; Dijkstra, K.-D.; Lozano, F. (2023). "World Odonata List". OdonataCentral, University of Alabama. Retrieved 14 Mar 2023.
  3. ^ a b "Gynacantha bayadera Selys, 1891".
  4. ^ a b "Gynacantha bayadera Selys, 1891". 2013-07-04.
  5. ^ a b K.A., Subramanian; K.G., Emiliyamma; R., Babu; C., Radhakrishnan; S.S., Talmale (2018). Atlas of Odonata (Insecta) of the Western Ghats, India. Zoological Survey of India. pp. 195–196. ISBN 9788181714954.
  6. ^ a b C FC Lt. Fraser (1936). The Fauna of British India, including Ceylon and Burma, Odonata Vol. III. Red Lion Court, Fleet Street, London: Taylor and Francis. pp. 103–106.
  7. ^ "Dragonflies and damselflies of Vietnam: Gynacantha bayadera - yet another Gynacantha (species 9)". 2016-01-08.
  8. ^ Fraser, F. C. (1920). "Some new Indian Dragonflies". The Journal of the Bombay Natural History Society. 27: 147. Retrieved 8 October 2018.
  9. ^ Priyadarshana, Tharaka Sudesh; van der Poorten, Nancy; Wijewardana, G. V. I. H.; Jayasooriya, A. L. A. C. (2015). "First record of Gynacantha millardi (Odonata: Aeshnidae) from Sri Lanka". Taprobanica. 7 (4): 266–267. Retrieved 9 October 2018.
  10. ^ Dawn, P; Chandra, K (2016). "Description of the larva of Gynacantha millardi Selys, 1891 (Odonata: Aeshnidae) from Chhattisgarh, India". Zootaxa. 4132 (2): 290–294. doi:10.11646/zootaxa.4132.2.12. PMID 27395672.
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Gynacantha bayadera: Brief Summary

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Gynacantha bayadera, parakeet darner or small duskhawker, is a species of dragonfly in the family Aeshnidae. It is found from India to South China and northern New Guinea. This is a crepuscular species which probably breeds in forested swamps and marshy areas, or in forest pools.

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