Orthetrum sabina sabina

Orthetrum sabina (Drury, 1770) 杜松蜻蜓/狭腹灰蜻 About Dru Drury (1725-1804) : Unlike the majority of the eminent natural historians of his time, the English entomologist Dru Drury (1725-1804) was not trained as a physician. After working 40 years as a silversmith, Drury retired in 1789 to devote his energies full time to his beloved insects, amassing one of the largest collections in Britain at over 11,000 specimens. Drury's three volume Illustrations of natural history is particularly noted for its exquisite hand colored plates, which display a notable artistic, as well as scientific, aspect
Found in Asia: China, Caucasus, Guandong, Guangxi, Hong Kong, Hainan, Indonesia, India, Japan, Kazakhstan, Lao, Sri Lanka, Myanmar, Malaysia, Philippines, Peninsular Malaysia, Russian Federation, Thailand, Taiwan, Viet Nam
Genus : Orthetrum	Super-Family: LIBELLULOIDEA	Family: LIBELLULIDAE

Egg mass of a female dragonfly Orthetrum sabina

♀53mm

2016-10-04 SPORT COMPLEX POND

More on EGGS OF DRAGONFLIES

Orthetrum sabina 杜松蜻蜓

Male ♂
body length = 51mm
hind wing span = 74mm

Female ♀
body length = 53mm
hind wing span = 77mm
　

eggs

Ref: Page 97 of DRAGONFLIES OF PENINSULAR MALAYSIA AND SINGAPORE by A.G. Orr

Male (above) and Female (below).

Orthetrum sabina are difficult to identify male and female without a close look at section 2 of the ball shaped abdomen. Both male and female are similar in pale yellowish green pattern.

狭腹灰蜻 (杜松蜻蜓) Orthetrum sabina (Drury,1770)

雄蟲複眼律色或深綠色，胸部綠色或黃綠色，側視具6條散亂的黑色斑紋，

雌蟲外觀近似雄蟲，可從尾毛的構造分別。

复眼为墨绿色，

生活於低中海拔山區，常見於水田、池塘、沼澤等水域活動，環境適應能力佳，為優勢的種類，數量很多。

雄蟲胸部為黃綠、黑色相間條狀斑；腹部黑色，具白色斑紋。雌雄差異不明顯。

本種是平地及中低海拔極常見的種類。成蟲出現在山溝、水田、池塘、沼澤等各類靜水環境，幾乎隨處可見。

生性兇猛，會捕食與自己體型相約的同類

雄蟲複眼墨綠色。胸部底色為淡綠色，側視有六條黑斑。

顏色黑綠相雜第4─6節突然變得非常細長 (以此特徵可輕易與同屬其他種區分) ，為黑底具白斑，

雌蟲外觀與雄蟲相似。未熟成蟲胸部底色呈黃色。

生態成蟲出現於3一 11月，廣泛分布於中海拔以下各地和蘭嶼，成蟲活動的範圍相當廣泛，沒有水域的地區仍然可見稚蟲棲息於水田、池塘、沼澤、湖泊、田溝等各類靜水域為生環境中。

複眼墨綠色，胸部以淡綠色為底色，側視具六條黑斑，翅透明，腹部為黃、綠、黑、白相混雜。分布於中、低海拔或蘭嶼綠島，成蟲出現月份為4-12月。成熟的雄蟲經常在棲息環境水域邊的枝條或石塊上佔據領域，遇到同種雄蟲或其他體型相近的種類會發生追逐爭鬥的情形。

本屬有10種 :
	金黃蜻蜓
	杜松蜻蜓
	鼎脈蜻蜓
	灰黑蜻蜓
	呂宋蜻蜓
	霜白蜻蜓(西里亞種)
	霜白蜻蜓(中印亞種)
	扶桑蜻蜓
	赭黃蜻蜓
	白刃蜻蜓


第1-3節特別膨大如球状	3節後突然變細	只有7-10節稍微再膨大, 黑色較粗

Orthetrum sabina (Drury, 1770) 杜松蜻蜓/狭腹灰蜻