123: Pseudagrion australasiae Selys, 1876

Number: 123 / Family: Coenagrionidae / Genus: Pseudagrion

Species: Pseudagrion australasiae / Look-alike Sprite

Habitat: Exposed Ponds, Lakes & Slow-moving Streams (Uplands & Lowlands)
Province(s) sighted: Widespread
Sightings (by me): Common
In flight (that I have seen): April-December
Species easily confused with: Pseudagrion microcephalum; Cercion malayanum;

One species that I'm sure I have seen a number of times is Pseudagrion australasiae. However, unless you are very, very close to it, it is hard to tell the difference between P. australasiae and P. microcephalum. Having studied photos for a long time, one difference I have noticed (I think) is that P. microcephalum is a brighter, more vivid blue. Whereas P. australasiae is a slightly more muted blue. Also, P. australasiae is slightly bigger but has shorter caudal appendages compared to that of P. microcephalum. 

The Male

As mentioned above, the male is very similar to the male of P. microcephalum. If you see two together, it is easier to compare as P. australasiae is duller in colouration and is also larger. Also, P. microcephalum is far more common in Khon Kaen and the surrounding areas. 

  

The 'Young' Male

This one hasn't quite developed that shimmering blue colour.

...and he needs a haircut!

P. australasiae is slightly larger than P. microcephalum (a good way of IDing if seen together)

The superior (top) appendages are shorter than those of P. microcephalum

dorsal view ...

The Female...

The female is very similar to other females in the genus. However, for me, I was lucky recently. At at large, shallow lake I saw recently at Khao Yai, Nakhon Ratchasima province, I spotted many males and females, including the female at all stages. P. microcephalum wasn't present, making identification much easier. Though this specimen is old.

The adult female is blue in colour.

The 'mid-stage' female...

Here, we have a mid-stage female, which is just showing signs of blue on the thorax.

The 'Young' Female...

This is a young female, which is brown in colour. There were many of these early in the morning. However, once the sun came up, they all vanished into the bushes and trees.