Showing posts with label Orolestes. Show all posts
Showing posts with label Orolestes. Show all posts

Sunday, July 3, 2016

184. Orolestes selysi McLachlan, 1895

Number: 184    
Family: Lestidae    
Genus: Orolestes    
Species: Orolestes selysi McLachlan, 1895 
Common name(s): N/A   
Synonyms: N/A    
Habitat: Forested pond (temporary)   
Province(s) sighted: Phu Khieo Wildlife Sanctuary (Chaiyaphum)  
Sightings (by me): Rare 
In flight (that I have seen): July    
Species easily confused with: Oroletes octomaculata

There are times when you have to question all those hours of your life spent being torn to shreds by nasty bushes, wading through treacle-like mud, waste deep in putrid water, bitten to death by leeches, mosquitoes and horseflies, as well as those long, arduous and expensive journeys. There are other times when it makes the bad times simply melt away. And last Saturday was one of them. I finally managed to see the fabled Orolestes selysi - a stunning damselfly that was the stuff of legends as many of the rarer species at Phu Khieo (and the rest of NE Thailand) seem to be. Though it is found in several countries, it seems to be a very rare species in Thailand. When, after all this time, I managed to spot one dangling from a tree overhanging a gloomy and temporary pond I was over the moon. Amazingly, like buses, I then noticed another and another. In fact, I saw three at this pond and two single specimens at other ponds. It must simply be a good year for them. Another thing of note was the fact that Orolestes octomaculata was also very much present (I am confident this species is around all year now) and they co-habit ... I was amazed to spot a male of each species on a branch, but was just too late to get a shot. The question is now whether there are hyaline specimens here too. According to Noppadon Makbun (the man who had said it was reported from Phu Khieo and encouraged me to find it), it is only known from this location in Thailand... hopefully it will be found again soon at a different location. Until then, I can now sleep happily, safe in the knowledge that I have photos of another rare species in Thailand. Roll on next weekend for more torture to my body for moments of true joy!





Here is the incredibly rare hyaline male. I managed to spot two males at a small pond and one shot each and they made a dash for the top of the tree canopy. Until next year, my friend, when I will get improvement shots!

Saturday, June 11, 2011

125. Orolestes octomaculatus (Martin, 1902)

Number: 125
Family: Lestidae
Genus: Orolestes
Species: Orolestes octomaculatus
Common name(s): N/A
Thai name(s): แมลงปอเข็มป่าผู้ปีกลาย, แมลงปอเข็มปีกแผ่ใหญ่แปดจุด, แมลงปอเข็มปีกกางแผ่นปีกลาย
Habitat: Exposed ponds on the edge of forests (lowlands)
Province(s) sighted: Phu Wiang NP & Phu Pha Man NP (Khon Kaen); Nam Nao NP (Petchabun).
Sightings (by me): Uncommon
In flight (that I have seen): April-June (longer, I'm sure)
A spreadwing that is widespread (that's a mouthful!), but uncommon and had eluded me until now, is Orolestes octomaculatus. I saw a male for the first time on June 11, 2011. However, today (June 18, 2011) I returned to find the female. Where I had seen three males at Tad Fah Waterfall, this time there was only one and I thought my luck was out. So I decided to visit Phu Wiang National Park itself about 20 kms away from the waterfall. About 300 metres inside the entrance there was a tiny and muddy clay pool to my left with a few bushes and trees overhanging and I thought I may as well have a look, seeing as though I was there already. To my amazement, there were around 20 male O. octomaculatus resting out of the sun under the leaves of a small tree. I managed to improve my photos from the previous week (though it took a long time as they fly high up into the tree the moment you even breathe) and then tried to take even more shots (sometimes I'll take hundreds of photos of the same individual just to make sure it's OK). As I was about to shoot again, I noticed something above it on the same branch... I took a photo just to see what it was and it turned out to be a female! Yet, it was in the strangest position I have ever seen. Watching her for about 20 minutes, I discovered she was ovipositing into the bark of the tree that overhung the pond. See female below for more information.

The male
It is easy to distinguish because of its beautiful wings, blue/green eyes and S9-10 are bright blue and it has large claspers. It is also large for a damselfly.


Lateral view. This shows the thoracic stripes very well indeed.


Here's looking at you ... 



Thoracic view of another male. This shows the thoracic stripes very well indeed.



The female
The female is rather dull in comparison, but what she did amazed me... 
The standard dorsal view. Note the 3 1/2 wings. Those boys are rough with her...



A slightly different angle...


Thoracic view. Note how much cover from the leaves she had...


And now for the acrobatics. Here you can see she is ovipositing by first making a hole into the bark...


You can clearly see that she twists her abdomen (from S5 down) to make the hole bigger (or whatever she is trying to achieve for the eggs)... This is something I have never seen before.


Bear in mind that the female was deep inside the tree and I had to shoot from a fair distance with flash, using a 300 mm lens... and this is what I saw at first... a male with a strange-looking thing above it. Actually, it was the female, carefully guarded by the male throughout the whole procedure... It really was a bizarre position.


More bizarre positions later... she slowly moved around the bark of the tree that overhung the pond and carried on doing this for about 20 minutes (you can see the little holes in the branch that she has made). Eventually, the guarding male interlocked with her and they flew high up into the tree canopy. As soon as this happened, most of the other males disappeared too.


Though it was a quiet day on the odonata front, today was special for me, as I saw something I am not sure many people have ever seen. It was an amazing spectacle for a girl with only 3 1/2 wings to produce. 

Then again, a stupid fat idiot travelled 400 kms (2 round trips) to see this species. Was it worth it? Of course it was. And my next trip... Nam Nao National Park (again). However, this time on my motorbike from Khon Kaen to Nam Nao... the distance on a 110cc bike makes me want to cry!