Trithemis aurora (Burmeister, 1839)曉褐蜻蜓/紫紅蜻蜓
ID Source #1 : http://www.asia-dragonfly.net
ID Source #2 : http://www.windsofkansas.com

http://freebsd.tspes.tpc.edu.tw/~afu/159.htm

 
Found in China, Guandong, Guangxi, Hong Kong, Hainan, Indonesia, India, Japan, Lao, Sri Lanka, Myanmar, Malaysia, Philippines, Thailand, Taiwan, Viet Nam
Sub-Order: ANISOPTERA Super-Family: LIBELLULOIDEA Family: LIBELLULIDAE

 

http://www.dragonflies.org/catalog.htm

 

Male Female

Head and body brilliant glowing red and dark purple.

Wing veins red

Head and body light brown with darker markings

Wing veins dark

 
Immature Male Immature Female

   

體長34-39mm，雄蟲腹眼紅色，合胸紅紫色，合胸側視具4條黑色的短斜斑，腹部紅色，末端9-10節側邊具黑斑，翅膀透明，翅脈紫紅色。雌蟲複眼上褐下灰，合胸黃褐色側視具4條波狀的斜線斑紋，腹部黃褐色，腹背具黑色的中線，側視兩邊各具一條縱走的粗黑色斑紋。未熟雄蟲近似雌蟲，但腹側及背上無縱走的黑色斑紋容易區分。生活於低中海拔山區之池塘、小溪、溝渠等水域，成蟲於4 - 11月出現，雌蟲以連續點水的方式產卵，為常見的種類。本屬有3種，其中灰脈蜻蜓身份未明。

腹長23-26 mm，後翅長27-30 mm。

成熟的雄蟲全身呈現豔麗的紫紅色，雌蟲和未熟的雄蟲則為黃褐色。

紫紅蜻蜓喜歡停在水域附近突出的枝條上，陽光強烈時，常常可以見到牠們將腹部往上高舉，以減少被曝曬的面積，形成「蜻蜓倒立」的有趣畫面。

紫紅蜻蜓在動物園裡各個水池都可見到，每個水池都可以看到數隻紫紅蜻蜓互相追逐，是非常容易觀察的蜻蜓之一。

腹部長23至26公釐。雄蟲雄蟲全身及翅脈均為紫紅色，翅痣為橙色。未成熟的個體則紫紅色為橙黃色。雌蟲,體色黃色，部背線黑色，側面下方有一條黑色斑。
生活在海拔2000公尺以下地區的池塘、沼澤或緩流小溪環境。成蟲出現於5至11月。是平地與山區的水池邊經常可見的蜻蜓之一

 

註：本屬有3種，為紫紅蜻蜓、樂仙蜻蜓、灰脈蜻蜓。

未熟雄蟲體色和雌蟲相近‧腹背、腹側無黑色斑‧

雌蟲體色黃色,複眼上半部褐色，下半部灰色,腹部背線黑色，腹側有黑色斑

This is the location I photograph the Trithemis aurora (Burmeister, 1839) on 1 October 2006...an open "Bath Room" of workers in a Cocoa plantation in Tawau, Sabah

The presence of Odonata is an indicator of ecosystem quality in the area.  A site that offer a wide variety of microhabitats has more species of Dragonflies and Damselflies.
HEAD

The head is large with flexible neck bearing well developed compound eyes, three ocelli and a pair of short, bristle-like antennae
Type #1 Type #2
   
 widely separated just touching, or extensively fused along the mid-line
(all damselflies, some dragonflies)

(Some dragonflies)
   

WINGS

Adult Odonata possess two pairs  of  long, narrow, and net-veined wings. The wing veins of Odonata are fused at their bases and the wings cannot be folded over the body at rest.
 Dragonflies Damselflies
sub equal equal
Front and hind wings are not similar Both wings are similar in size and shape
Dragonflies hold the wings horizontally outward when at rest, Damselflies hold them folded parallel with the abdomen or tilted upward
   

INDEX : Dragonfly     February 06, 2007 11:16:33 AM