Scientific Name: Gynacantha dohrni
Common Name: Spear-tail Duskhawker
Spear-tailed duskhawker is a widespread but uncommon species of fairly large dragonfly which can be found in many swampy forested areas around the Central Catchment Nature Reserve, Bukit Timah Nature Reserves as well as in the secondary forests of Mandai, Kranji and Chestnut area.
It is a species that prefers dense and dark forest undergrowth, often around the vicinity of forest pools or streams where it hides in the shade and perch motionlessly on vertical twig during the day. It becomes active at dusk.
Male has green eyes and thorax. The auricles on the side of the 2nd abdominal segment are bright blue. It has a T-shaped marking on the top of the fron. Wings are mainly clear. Abdomen is dark with flecks of green markings. Male’s superior appendages are spear-shaped towards the tip, while the inferior appendage is short and pale in color.
Females generally are quite similar to males in term of color and markings. The wings are rounder and the appendages are often broken off due to mating or ovipositing. Females are found to breed in forest pools and sometimes they even ovipositing their eggs into rock, or mud crevices, from my observation.
This is one of the most common species of aeshnidae which can be found locally.