Showing posts with label Copera. Show all posts
Showing posts with label Copera. Show all posts

Wednesday, March 2, 2011

61. Copera vittata vittata (Selys, 1863)

No: 61 / Family: Platycnemididae / Genus: Copera
Name: Copera v. vittata / Variable Featherlegs 
Habitat: Heavily forested trickles and streams (uplands & lowlands)
Province(s): Widespread
In flight: March-November / Sightings (by me): Locally common
Easily confused with: Copera chantaburii

The fourth and final species of the Copera genus found in Thailand, is Copera vittata vittata. It is commonly found along rivers and canal ways. The only problem is trying to get good photos of it, as it tends to perch virtually on the ground.  I am still trying to get better photos of the female. They are extremely skittish and love extremely dark areas, making photography extremely difficult.

The male
The male is fairly easy to recognise, because of its red legs and yellow and black markings to the thorax and the caudal appendages are quite large for this genus. 



The 'Teneral' Male
These are very young males, often known as 'ghost form' specimens. Pretty cool, right?




The female
The female is really difficult to spot, as it likes very dark areas and hangs closely to the floor. It took me many trips to even spot one and this is the best photo I have so far. I will post a better one when I manage to locate another female.


The 'Teneral' Female
This is a 'ghost form' of a female (basically young).



The copula


You can find this species throughout the country. But you have to have a keen eye to spot them, especially the females. So, now you can see ALL species of Copera on my blog!

60. Copera marginipes (Rambur, 1842)

No: 60 / Family: Platycnemididae / Genus: Copera
Name: Copera marginipes / Yellow Featherlegs 
Habitat: Ponds and Lakes to Forested Streams (Uplands & Lowlands)
Province(s): Widespread
In flight: February-December / Sightings (by me): Very common
Easily confused with: N/A

A very common damselfly that I have seen in many places and on numerous occasions is that of Copera marginipes, the third species of the Copera genus I have added to the blog. It is quite easy to find at many bodies of water. It is has plenty of shaded vegetation, you have a very good chance of finding it.

The male
The male is easy to spot with its bright yellow legs and end segments that are white. Its caudal appendages are also large.



Not quite fully mature ...



The 'Young' Male
Another common sight is that of the teneral male, also known as the "ghost" phase. It has all the hallmarks of the male, but is almost white in colour.


The mature female
The female is almost identical to that of the mature male, though I don't see the female all that often at this stage.




The 'mid-stage' female
This stage of female is more difficult to spot as it is very dull in colour. You have to look quite hard to find it. Here you can see it blends in perfectly with the background.



The 'Teneral' Female
As with the male, the teneral female also has a "ghost" form. At certain times of the year, you can spot many of these 'floating around' in the undergrowth, disturbed as you pass them by.



Love is in the air...
This copula, or "wheel" as it is also known, displays the perfect love symbol... the heart.


The Tandem


Oviposition ...
Often seen, but difficult to photograph, especially as they oviposit really low down at the edges of  slow-moving streams/ponds





You can see this species all year round at many places, such as ponds, lakes and other weedy areas. They are quite shy but you should be able to photograph them if you are cautious enough.

59. Copera chantaburii (Asahina, 1984)

No: 59 / Family: Platycnemididae / Genus: Copera
Name: Copera chantaburii / Chantaburi Featherlegs 
Habitat: Lowland Tree-lined Muddy Ditches and Pools of Water
Province(s): Khon Kaen, Chantaburi
In flight: October-December / Sightings (by me): Locally common
Easily confused with: Copera vittata

A few years ago, I decided to chance my arm and looked under a bridge that was underneath a major highway, in Khon Kaen. Just outside the bridge, there was marshland, which I think is the overflow from the River Chi. In the marshland there were two common species of Copera: C. marginipes and C. ciliata. Then a third Copera species then caught my eye. I followed it as it went right under the bridge. Underneath, it was gloomy and had a small puddle. I managed to get a photo of it and I thought it was C. vitta vitta. A while later, Noppadon Makbun informed me that I had incorrectly identified the species and that it was in fact Copera chantaburii. Apparently I was only the second to identify this species outside Chantaburi, which pleased me no end. It is, however, close to Copera marginipes. There are a number of differences to identify it though. Since that day, I have been back a number of times and taken better photos and also spotted the species in a number of other places around Khon Kaen, and I also spotted it in Chantaburi of all places ;) 

The male
The male is very similar to the male C. marginipes, but the easiest way to tell them apart is to look at the caudal appandages, which have very little white on them compared to that of C. marginipes. Also, the markings on the thorax are different and overall it is a little smaller. It also likes to be in very dark areas.




An unfortunate ending for this one ...


The Female
The female is extremely difficult to spot as it hangs around in the darkest of areas, in this instance resting on a dark stick, over black mud, under a darkened tunnel... how nice of it to make photography impossible! Also the female itself is also very dark in colour and I only could see the female's dark grey end segments and white rings on the abdomen.






An old female
A copula




The 'Tandem'



I'm not sure just how common this species is, but it is doing very well in Khon Kaen. I saw this species on a regular basis from October-December.