Last Updated on Monday, 11 April, 2022 11:08:14 PM

INDEX  >  Dragonflies of Borneo  >  Family Libellulidae  >  Hydrobasileus croceus (Brauer, 1867)

Hydrobasileus croceus
Hydrobasileus croceus

2007-10-13 SAT 10:03 DRAGONFLY POND

Found in Asia: Bangladesh, China, Guandong, Hong Kong, Hainan, Indonesia, India, Japan, Sri Lanka, Myanmar, Malaysia, Philippines, Peninsular Malaysia, Singapore, Thailand, Taiwan, Viet Nam

Hydrobasileus croceus  hw 43 mm. Unmistakable hw marking easily visible in flying insect. . Lowland lakes, swamp forest margins and larger, well vegetated ponds and drains in open country. Adults sail conspicuously, seldom perching. Translucent larva with very long posterior and dorsal spines on abdomen, pelagic among sub-surface water weed. Widespread in tropical Asia.

Hydrobasileus croceus
is a large, heavy species (hw, 40-43 mm) with a distinctive brown mark at the anal angle of the hind wing easily visible in flight. The anal loop is uniquely club-shaped. It is found mainly in the lowlands on well vegetated lakes and marshes including open areas in black water peat swamp. Males soar back and forth patrolling large territories. The female is similarly marked, but less strongly.


Pseudagrion sp HILLZONE 婆羅洲細蟌

Ichneumon sp BORNEO
Insects of Borneo

Insects are  diverse and dominant inhabitants of the tropical rainforests in Borneo Island. New species are discovered too often. Entomologists are still struggling to cope with the documentation of tropical insect diversity.

Red Dragonfly of Sabah
Red Dragonfly of Sabah

Most of the common dragonflies in Sabah are red coloured, especially from the family Libellulidae.  Some red pecies are even confused as same species, for example the three species of Genus Neurothemis.

Eyes of a male Brachydiplax chalybea
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 the abdomen:
1- using Ovipositor Structure
2- using Vulvar Lamina

Male do not have an ovipositor. Instead male dragonfly and damselfly have appendages.


Ficus subgelderi 淡金榕
Fig trees of Sabah

Borneo has 150 species of wild fig trees. Most of them are found in forests of Sabah.

Tiger Prawn Farms in Tawau
Tiger Prawn Farms in Tawau

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.

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Damselflies of Borneo