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

Vestalis amethystina vs Vestalis amoena

Peninsular Malaysia has three Vestalis species - Vestalis amethystina, Vestalis amoena and Vestalis gracilis. Vestalis gracilis is easily told apart from the previous two species based on the thoracic marking. However, both Vestalis amethystina and Vestalis amoena are similar to each other in overall marking. The only character used to distinguish both the species is their anal appendages.

Vestalis amethystina - male

Hutan Simpan Gunung Tebu, Terengganu

Vestalis amoena - male

Taman Negeri Rompin, Pahang

The anal appendages of Vestalis amethystina and Vestalis amoena are different (see images below). Close inspection on the anal appendages is needed for proper species identification. 

anal appendages of Vestalis amethystina. top = lateral view, middle = dorsal view, and bottom = ventral view

anal appendages of Vestalis amoena. top = lateral view, middle = dorsal view, and bottom = ventral view

Bandar Bukit Raja Townpark

Bandar Bukit Rajah Townpark is located at Klang District of Selangor. The townpark is open to public and facilitated with plenty of free car parking space. It is a good place for dragonfly watching. Sime Darby Property has given some info on the Odonata diversity of the townpark. If you want to photograph Trithemis pallidinervis, Diplacodes nebulosa and Neurothemis tullia, this is a good place to go for because these species are found in abundance at the townpark.

one of the ponds at Bandar Bukit Raja Townpark

drainages at Bandar Bukit Raja Townpark

Here is the url link on the Sime Darby Property's urban biodiversity of Bandar Bukit Raja Townpark:

https://www.simedarbyproperty.com/sustainability/urbanbiodiversity/spotlight-bandar-bukit-raja.html?fbclid=IwZXh0bgNhZW0CMTAAAR2Reji_Lp4tiR0U_p1RWYMr8tpVAnlKZwIU7MERKduPHck_MHYevGxpxRI_aem_s9DUHiBVCc97iBQRv2ZxHg

Females of Heliocypha biforata, Heliocypha perforata and Aristocypha fenestrella

Aristocypha fenestrella, Heliocypha biforata and Heliocypha perforata are found in Peninsular Malaysia. The size of  these species is not much different from each other. The males of these species  are easily told apart by the coloration of their body. On the other hand, the females have quite similar coloration. However, they can be distinguished by the yellow marking of their bodies (see the below photos).