When you look at it, doesn't it have an eccentric color? You can imagine it like a fashion model wearing a dark shirt with red pants or skirt. Eccentric right?
It tends to fly low, often gliding along the same route, to then return to perch in a familiar place (The Skimmer). Therefore, when you find it and want to take pictures, and suddenly it flies, you don't have to be upset! You don't have to change position or chase it. You just wait in your position, or you can choose the angle you want and stand by in that place, but don't move too much. It will usually return to where it is usually perched, or slightly nearby, and you can shoot easily. If you don't make any suspicious movements, it won't care about you, and it will continue to focus on the flying insects that it will snatch up in the air.
As a skimmer, it certainly comes from the largest and most colorful dragonfly family, Libellulidae. The wings are patterned, and when spread out, they look flat. Before the adult stage, it is aquatic, and the appearance of males and females is different when mature (dimorphic). This dark body and red tail is Brachymesia furcata (Hagen, 1861). Brachymesia is commonly known as tropical pennants. While the red tail is also commonly called the red-tailed pennant. They live in semi-aquatic habitats.
This male lives in the silence of a pine forest on a beach. Around there is stagnant brackish water. There, apparently, B. furcata lay eggs and the nymphs hid and ate. That seems indeed a potential location where B.furcata can be found. It is a dragonfly that is beneficial to the environment because it eats mosquitoes, flies, winged ants and it is a midges.
Wikipedia states that the distribution of Brachymesia furcata includes Benin, Botswana, Cameroon, Ivory Coast, Equatorial Guinea, Ethiopia, Ghana, Guinea, Kenya, Liberia, Malawi, Mozambique, Namibia, Nigeria, South Africa, Tanzania, Togo, Uganda, Zambia, Zimbabwe. So, with this post, you can also find out that this species of tropical pennants is also distributed in Sumatra, or rather, in Aceh, north of the island of Sumatra.
(Sources: Skimmer, Dragonfly; Libellulidae; Brachymesia; Brachymesia furcata)