Scientific Name: Agriocnemis minima
Common Name: NA
According to the IUCN Red List of Threatened Species, 2014, Agriocnemis minima is a fairly and widely distributed species which occurs in Thailand’s agricultural fields. It is also found in Cambodia, P. Malaysia and Indonesia.
Mr Tang in his book – “Dragonflies of Singapore” did not mention of this species ever existed in Singapore. In late 2013, and early 2014, after searching at a stretch of wet marsh land in the Western part of Singapore on many occasions, I have finally found a small colony of this species residing at the edges of the shallow wetland.
This species is found in swamp forest and shallow marshes in the open forest. It is very tiny and prefers to perch lowly among reeds near the water edge.
The thorax of the adult males are green with black stripes at the synthorax. Abdomen are black dorsally and the last two segments are orange. The superior appendages are very prominent. They are longer than the inferior appendages and curve downward. It is orange in colour. The pterostigma is yellowish in colour.
Females are equally tiny and the colour changes from bright orange and red to greyish as it matures.
This species is a new record in Singapore. Let’s hope that it will survive in this small wetland as this place is quite remote and practically no disturbance from any human activities.
Scientific Name: Agriocnemis nana
Common Name: Dwarf Wisp
This tiny damselfly is the smallest damselfly in Singapore. It is found in grass marshes in open forests, small streams and vegetation around edges of the central catchment reservoirs. It is very rare and localised in Singapore. The only places where I have found this species is at the water edges of the MacRitchie reservoir.
The male has a blue thorax with black strips and blue abdomen. The labrum is blue and the pterostigma is bluish-white.
The female is more colourful with green-yellowish thorax and blue abdomen. The pterostigma is pale brown.
I have only seen this species on just two to three occasions at the MacRitchie reservoir. Hope this species still survives as I have not seen it for quite a long time.
This Agriocnemis sp. was taken at a small stream near Mandai forests. I have no idea what is the species, although I am inclined to think it is Agriocnemis pygmaea which is very rare in Singapore. This is the only picture I have of this individual.
Scientific Name: Agriocnemis femina
Common Name: Common Wisp
This is a very small damselfly with a wing span of only 9-10 mm. It is a relatively common and widespread species of damselfly in Singapore. It can be found in grassy areas with water bodies such as ponds, lakes, streams, and drains. So far, I have seen this species at Toa Payoh Town Park, Chestnut Forest Trail, Mandai Forest, MacRitchie Nature Reserve, and Sungei Buloh Nature Reserve.
Due to it’s size, this tiny damselfly has often been overlook by photographer. Both males and females developed various colour forms from very young to adult maturity.
Young males are green with black strips on the dorsum and orange tips. Older males developed pruinosed white to it’s thorax. In males, the inferior appendages is longer than the superior appendages, a distinguishing feature of this species.
Young females are cherry red, then develop into bright green with light brown on it’s thorax. Older females are generally olive with darker brown markings.
A. femina is one of the most abundant Agriocnemis species that occurred in Singapore. The other two species are A.nana, and A. pygmaea.
Scientific Name: Gynacantha basiguttata
Common Name: Spoon-tailed Duskhawker
Encountering a rare female Gynacantha basiguttata was lucky enough, let alone a female which oviposit at a forest pool in the secondary forest near Mandai. It was around 10 plus in the morning when I arrived. The forest pool was almost dried up after days of dry weather. It was flooded with fallen leaves and broken branches. Although it was without any trace of water, the soil was quite damp.
This female suddenly appears and starts to oviposit on the damp soil. she spent quite awhile surveying the area and looking for suitable spots. She will hang around at a particular spot for awhile, lay her eggs and then move on to another spot.
She randomly chose her breeding spots, which include decayed leaves, damp soil and rotten logs.
This place is indeed a perfect breeding place for the forest-dwelling duskhawkers.