28 August 2025

27 August 2025

Agriocnemis femina

Agriocnemis femina - female; egg laying
Kajang, Selangor

Pseudagrion microcephalum - Submerged Oviposition

I spotted a tandem pair of Pseudagrion microcephalum laying eggs at a pond at late afternoon. While the female was laying eggs above the surface water (on aquatic plant) with the male still attached in tandem to it, a male Brachythemis contaminata came suddenly to grab (preying) the male Pseudagrion microcephalum. So, the Pseudagrion microcephalum male was detached from the female. However, the female was untouched by the sudden act, and remaining at the same spot continuing to perform egg-laying. After a while, the female submerged into water to continue laying eggs (see below photos). At one time, the whole body including the wings was totally under the water.



26 August 2025

Larva - Pseudagrion microcephalum

The normal aquatic habitat for Pseudagrion microcephalum is open ponds or open marshes. I have seen frequently the larval emergence of P. microcephalum took place at late afternoon. Below photo shows a larva of P. microcephalum out of water on a waterlily leaf ready for larval emergence. The photo was taken around 5.30 pm at a pond. 


Pseudagrion microcephalum - male
ready for larval emergence
Kajang, Selangor


click here to see the adult of Pseudagrion microcephalum

Euphaea impar

Euphaea impar - female
Taman Eko Rimba Jeram Linang, Kelantan

Exuvia - Pseudagrion microcephalum

Pseudagrion microcephalum - male
Kajang, Selangor 


click here to see the adult of Pseudagrion microcephalum

24 August 2025

Pseudagrion australasiae vs Pseudagrion microcephalum

The blue markings of the male individuals of Pseudagrion australasiae and Pseudagrion microcephalum are quite similar to each other. However, Pseudagrion australasiae is slightly larger than Pseudagrion microcephalum. Apart from that, their anal appendages are different as shown in the diagram below:


Anal appendages (left lateral view). Top is Pseudagrion australasiae and bottom is Pseudagrion microcephalum.

22 August 2025

Aciagrion borneense

Aciagrion borneense - female
Kajang, Selangor 

Crocothemis servilia

Young male Crocothemis servilia is yellow in colour. On the other hand, the matured male is red in colour. Click here to see the matured male of Crocothemis servilia.


Crocothemis servilia - young male
obelisk posture 
Kajang, Selangor

19 August 2025

Diplacodes nebulosa - Young Male

Below photo shows a very young male individual of Diplacodes nebulosa. The body marking of young male Diplacodes nebulosa resembles the female (click here to see Diplacodes nebulosa female). Matured male individual of Diplacodes nebulosa has greyish blue body colour and the forewing and hindwing tips are tinted (click here to see the mature male individual). The dark wing tips in male individual are developed progressive on maturity (click here to see a slight tinted wing tips in not so young male individual of Diplacodes nebulosa). 


Diplacodes nebulosa - young male
Kajang, Selangor

17 August 2025

Rhyothemis triangularis - Damaged by Rain

Below photograph shows a newly emerged male individual of Rhyothemis triangularis. This photograph was taken in the morning at a pond. It looks like this male individual was successfully emerged from a larva in the night. However, this individual was caught in the rain right after its larval emergence, causing its fresh and delicate wings stuck together by the rain water.


Rhyothemis triangularis - male
UKM Bangi, Selangor

Aciagrion borneense

Aciagrion borneense - mating
Kajang, Selangor 

Diplacodes nebulosa

Diplacodes nebulosa - female
Kajang, Selangor

Sketch - Anal Appendages of Agriocnemis minima

a sketch of the anal appendages of Agriocnemis minima (lateral view; right side)



14 August 2025

Rhodothemis rufa - Unsuccessful Larval Emergence

I spotted this dead dragonfly at a retention pond of a residential area in Kajang. This dead dragonfly is of an unsuccessful larval emergence. It looks like the larval emergence took place at least 2 days ago. Close inspection of the dead dragonfly reveals that it is a male individual of Rhodothemis rufa


Rhodothemis rufa - male
Kajang, Selangor 

Crocothemis servilia

Crocothemis servilia - male
Kajang, Selangor

11 August 2025

Neurothemis fluctuans - Territorial Fighting

Two males of Neurothemis fluctuans are engaging in territorial fighting.


Neurothemis fluctuans; two males
UKM Bangi, Selangor

10 August 2025

03 August 2025

Tetrathemis haylina - Egg Development

I collected some eggs of Tetrathemis hyalina. The eggs were laid on 26 July 2025 around 10 am. The eggs started to hatch on 2 August 2025 (minimum 8 days). Showing below is a series of egg development of a single egg from the cluster of eggs collected on 26 July 2025. This egg hatched on 3 August 2025 around noon. So, this egg took 9 days to hatch.


Egg development (ex situ) of a single egg of Tetrathemis hyalina. The first Day-9 image was taken in the morning. The second and third Day-9 images were taken in the afternoon. The second Day-9 image is an empty egg shell and the third Day-9 image is a prolarva from the egg.