30 December 2024

Orthetrum glaucum vs Orthetrum luzonicum

It is quite a challenge for laymen to tell apart Orthetrum glaucum from Orthetrum luzonicum because both (matured males) are light blue in colour. Actually, we are still able to distinguish them if we look at them carefully. Orthetrum glaucum is slightly larger than Orthetrum luzonicum. The hindwing base of Orthetrum glaucum has dark patch, but this is absent in Orthetrum luzonicum. Apart from that, the abdomen of Orthetrum luzonicum is slightly slender if compared to Orthetrum glaucum.


Orthetrum luzonicum (male; left) and Orthetrum glaucum (male; right)
UKM Bangi, Selangor

29 December 2024

Archibasis rebeccae

I saw this Archibasis rebeccae female performed an act to grab a small spider resting on its net. The Archibasis rebeccae approached the spider net skillfully so that it was not stuck herself on the net of the spider. Hovering at the same level as the spider (the spider net was at the vertical position), she suddenly pushed forward her legs to grab the spider and then retreated herself away from the vertical spider net so that she did not crush into the spider net.  

Archibasis rebeccae - female
feeding on a small spider
UKM Bangi, Selangor

26 December 2024

22 December 2024

19 December 2024

Xiphiagrion cyanomelas

Xiphiagrion cyanomelas
being preyed - the male has lost his thorax and head and the female has lost her abdomen
Imbak Canyon, Sabah

17 December 2024

Pseudagrion pruinosum

I witnessed partial submerging oviposition of Pseudagrion pruinosum. I believe in rare occasion it will do a total submerging oviposition.



Pseudagrion pruinosum - oviposition
UKM Bangi, Selangor



P/S:
I searched the internet for information on the egg laying of Pseudagrion pruinosum. So, it has been recorded that Pseudagrion pruinosum does total underwater oviposition with the male individual also down into the water. Click here for the paper about the egg laying of Pseudagrion pruinosum