Last Updated on Thursday, 31 March, 2022 12:40:14 AM
Dragonflies of Borneo > Family Libellulidae > Genus Orthetrum > Orthetrum testaceum
Species: Orthetrum testaceum
A common red dragonfly of Borneo
Found in China, Hainan, Indonesia, Myanmar, Malaysia, Philippines, Thailand, Taiwan, Viet Nam
An aging female Orthetrum testaceum
Body color patterns of an aging female Orthetrum testaceum is so different to a young female. These differences in degree of:
1) Body color turn grayish green , where as a young female is bright brown.
2) Wing color turn tan color, where a young male and female all have clear wings.
Female turn greenish color as they age.
This is an aging female with white powder (white pruinescence) developed at the lower part of body. Segment 8, 9 and 10 stained with mud that dried up indication she had experienced laying eggs on water not long ago.
Matured male Orthetrum testaceum
Body parts of a male dragonfly
Male Orthetrum testaceum
Head parts of a dragonfly
Red Dragonfly of Sabah
The compound eyes of dragonflies
Dragonflies and damselflies have large compound eyes that can see in all directions. When the compound eye is magnified several hundred times, each individual facet (ommatidium) is shown to be hexagonal in shape.
Ovipositor (Vulvar Lamina)
of Female Dragonflies and Damselflies
Female dragonflies have either one of the two method of depositing eggs from
1- using Ovipositor Structure
2- using Vulvar Lamina
Male do not have an ovipositor. Instead male dragonfly and damselfly have appendages.
Borneo has 150 species of wild fig trees. Most of them are found in forests of Sabah.
Prawn farming is a main commercial activities in Tawau. Spawners from Tawau are graded the best in Malaysia. For decades, Tawau has been exporting high-grade tiger prawns to several countries such as Korea, Japan, Taiwan, China, Vietnam, Singapore, Egypt and Australia.
|Damselflies of Borneo|