Scientific Name: Idionyx yolanda
Common Name: Shadowdancer
This small and lightly build dragonfly is quite rare and localised in the Central Catchment Nature Reserve of Singapore. They inhabits in small forest streams in the nature reserve. It is listed as critically endangered species in the Singapore Red Data Book. So far, I have only encountered this species a couple of times at the forests at Upper Seletar Reservoir, MacRitchie Reservoir, and Upper Pierce Reservoir.
The eyes are brilliant green. The thorax are short and compact, metallic green, with yellow lateral band. The anal appendages are very distinctive, the inferior being long, trifurcated towards tip. There are yellow patches at the base of the wings.
Males and females are similar in appearance. Due to their small in sizes and greenish-black in colour, it is not easy to spot them in the forests. Occasionally, this species is observed flying erratically, non-stop, over a small area in the forest.
The female of Macromia cydippe is extremely rare, and I believe, has never been recorded in Singapore. In October 2013, I chanced upon a female of this species perched on a branch about 2 metres away from the ground at MacRitchie Reservoir. Immediately I knew that this could be the rare M.cydippe from the distinct whitish band on it’s abdomen.
The eyes of this female appeared to be greyish, the band is more whitish than yellowish and the pair of front wings is tinted with brownish patch.
Apparently, the female was waiting to mate with the male as I have also seen at least one male perching near to where the female was found.
From my observation, this species is quite widespread but very localised in Singapore. So far, it has been sited at a few locations such as NSSF, MacRitchie Reservoir and Venus Drive.
Macromia Cydippe is a very rare dragonfly species in Singapore. It was first recorded at Nee Soon Swamp Forest on 3rd January 2010. It is a forest species which prefers sluggish and clean-bottomed streams.
M.cydippe and M.cincta are both very similar in appearance. M. cydippe is characterised by it’s smaller size, more slenderer body, and a distinct yellow band at the base of the 7th abdominal segment. The inferior appendage of the male M. cydippe is much longer than it’s superior appendage.
I have seen this species, usually males, a couple of times at NSSF and MacRitchie Reservoir. Similarly to M. Cincta, this species like to perch motionlessly on twig just slightly above eye level.