Scientific Name: Mortonagrion arthuri
Common Name: Arthur’s Midget
Mortonagrion arthuri is a locally rare species of damselfly which is confined to mangrove habitats around Singapore, particularly Pulau Ubin, Pulau Semakau and Sungei Cina.
Their natural habitats are inlets of mangrove swamps where they like to rest on the tip of an emergent twig of mangrove trees.
Male has two color forms. Blue form and yellow form. The blue form has blue stripes on the side of the thorax and blue postocular spots; while the yellow form has similar features but in yellow. Male also has distinct blue spots on the segment 8 of it’s abdomen.
Females are duller in color. It has brown thorax with similar stripes to the male. Young female also has the distinct spots on it’s abdomen. Older female has the spots completely obscured.
In general, males of mortonagrion arthuri are more rarer than females.
Males of this species are generally hard to find. I have seen a couple of females at Pulau Ubin but not a single male.
I have better luck at Sungei Cina, where I managed to captured a couple of males both in blue and yellow form.
In Singapore, not many photos of this species has been available in the internet. I hope these photos could add to the archive of the diversity of odonata found in Singapore’s natural environment.