Indaeschna grubaueri

Anisoptera

Species Name: Indaeschna grubaueri

Family: Aeshnidae

Male resting beside pond

Members of the family Aeshnidae are the gaints of the Odonata and this is one of the largest of the gaints. This is the second time that I've seen and photographed this species at the very same pond at the edge of a forest reserve near Lahad Datu town. The first time was in 2006 when I saw a male resting on vegetation at the side of the pond, and today I was fortunate enough to see this huge female ovipositing at this pond. Interestingly she was laying her eggs in the moist soil just above the water. This species is also known to lay its eggs in water-filled tree holes and on buttress cavities of large trees.

Female on the wing

Females of I. grubaueri have hindwings that measure up to 68mm while males are thinner and smaller with 59-62mm long hindwings. Both sexes are similarly coloured with bright lime-green markings on the thorax and wide bands on the abdomen.

Female ovipositing on wet soil above water line

This species is said to be widespread in lowland forest in Sundaland and the Philippines.

Libellago hyalina

Zygoptera

Species Name: Libellago hyalina

Family: Chlorocyphidae

This is the other Libellago sp. which I was able to photograph with my Nokia mobile phone in the Binusan Forest Reserve in Nunukan, Kalimantan Timur, Indonesia during my short visit there last week. Dr Rory Dow said my photos "almost certainly" showed Libellago hyalina.

L. hyalina has a wider range than the sp. in my previous post, being found from parts of China, Thailand, down to Peninsular Malaysia, Borneo and other parts of Indonesia.

My photos show the mature male which has a dark blue/purple abdomen (apparent only when seen in bright sunlight). Immature males have red markings on the abdomen, while the females like those of other spp. in this genus are rather darb in colour.

Libellago phaethon

Zygoptera

Species Name: Libellago phaethon

Family: Chlorocyphidae

Last week I took the short ferry ride from Tawau, Sabah across the border to Nunukan in East Kalimantan, Indonesia. There, friends took me to a picnic area in a forest reserve near town but unfortunately I had not brought along my DSLR camera, because I found some very interesting damselfly species which were new to me! Two of them were Libellago spp. of which, after much patience, I was able to take some fairly sharp photos with my Nokia N85 mobile phone camera!

L. phaethon is said to be known only from northeast Borneo (just south of Tawau, Nunukan Island would be in this area) being more well known from small streams in Danum in Sabah.

The male is uniquely coloured blue (on thorax and basal half of abdomen) and red markings on the rest of the abdomen. The female (which I did not see) like those of the other species in the genus is darb in colour and difficult to identify unless when associated with the males.

I observed typical Libellago male agression behaviour among the males - two males would hover above a piece of territory facing each other until one of them retreats. I also saw this species confront males of L. hyalina  which was also quite common here in this manner.

Tholymis tillarga

Anisoptera

Species name: Tholymis tillarga

Family: Libellulidae

A male resting in the shade during the day photographed 

on Pulau Sapi an island off Kota Kinabalu  

This is another common crepuscular libellulid like the two Zyxomma ssp. (obtusum & petiolatum) and are found in similar habitats, i.e. drains, weedy ponds and other open bodies of water. 

Two males in flight at dusk

It is active at dusk, flying to and fro along drains and across ponds, the males are quite conspicuous for the white wing patches. In flight they are rather frustrating to photograph! 

An immature male showing very faint white wing patch

A female

The body of this medium-sized insect is orange-brown and the hindwing has an amber tinted patch followed by a patch of bluish white in the males while this white patch is absent in the female. Hence its common name - Coral-tailed Cloudwing.

Distribution: widespread in tropical Asia, Africa and Australasia.

Drepanosticta versicolor

Zygoptera

Species Name: Drepanosticta versicolor

Family: Platystictidae

Members of this family of small damselflies are dwellers of primary dipterocarp forest and found on small streamlets and boggy areas around springs. Drepanosticta spp are brownish bronze in colour, usually with abdomens marked sparingly with light blue or pale spots and they fly close to the ground in the shaded  forest understorey making them very difficult to see. I only saw this specimen for a few moments before it vanished back into the shadows!

Bornean platystictids are still not well studied and many more new species are likely to be found. However the insect in my photos is quite likely to be D. versicolor by virtue of the presence of a long sharp spine on the rear margin of its prothorax. (I thank Dr Rory Dow for identifying these, and other photos for me).

I took these photos on a recent visit to the Danum Valley Field Centre whose many jungle trails and streams proved to be ideal hunting grounds for me! Alas two days was simply too short!

Coeliccia nigrohamata

Zygoptera

Species Name: Coeliccia nigrohamata

Family: Platynemididae

I found several males of these small damselflies with conspicious blue markings on the upperside of the thorax resting on low vegetation along a small streamlet on the forest edge in the Danum Valley Field Centre. Unlike most damselflies they were extremely unafraid and I could easily pick them up with my hand. (Unfortunately I did not see any females).

On checking Dr A G Orr's Dragonflies of Borneo later I found my photos matched that of Coeliccia nigrohamata. I was however informed that members in this group of Coeliccia were currently under reclassification and this could very well be classified as a different species! 

Coeliccia spp. are found in forested habitats, inhabiting fresh water marshes, streams and springs. They are not usually found in open country or big rivers. This particular species belongs to a group of blue-marked species in the genus, another group consists of mainly species with yellow markings. A species found in Peninsular Malaysia, C. octogesima has a famous blue telephone-shaped logo on the synthorax (see Dr Choong's blog).

Coeliccia nigrohamata  has been recorded from Brunei and Sabah.

Neurobasis longipes

Zygoptera

Species Name: Neurobasis longipes

Family: Calopterygidae

Male on rock in midstream (taken without flash)

This  surely has to be the most beautiful damselfly in Borneo! Witnessing it in nature is one of the most breathtaking experiences for me. My photos hardly convey the true beauty of this creature that has simply to be seen in life.  I had previously only glimpsed it momentarily on a few ocassions in forested rivers and had never had a chance to photograph it until now. 

Close-up of male (taken with flash)

I saw this spectacular male in the shallow rocky Sungai Palum Tambun which is a tributary of the mighty Segama River in the Danum Valley Field Centre. It was tirelessly flitting from rock to rock in the late afternoon, occassionally I also saw his less colourful mate, but she was too shy to pause and pose for me! It had me chasing it from rock to rock trying to get a good picture and mercifully, just as I was about to become totally exhausted and before the sun disappeared, it stayed put for a while and let me approach it to get my photo!

The body of both sexes are bright metallic green in colour, the top of the male's hindwings are brilliantly iridescent  green and its forewings are clear with a yellow-brown tint while the both the female's wings are clear with a lighter yellow-brown tint.

Members of the family Calopterygidae (from the Greek words meaning beautiful wings) are slender with long thin legs and mainly coloured metallic green. N. longipes is found in Borneo as well as in Peninsular Malaysia where another similar and slightly bigger species N. chinensis is also found.