The blue riverdamsel, Pseudagrion microcephalum is a common species of damselfly in the family Coenagrionidae. It is also known as the blue sprite[6] and blue grass dart.
This species can be found in the Australian states of New South Wales, Northern Territory, Queensland, Victoria and Western Australia. It can also be found in Africa: southern Nigeria and Asia: Bangladesh, China, Guangxi, Hong Kong, Hainan, Indonesia, India, Japan, Sri Lanka, Myanmar, Malaysia, Philippines, Peninsular Malaysia, Singapore, Thailand, Taiwan, and Viet Nam.
It is a medium-sized damselfly with pale blue eyes, dark on top. They grow to 38mm in length. Its thorax is azure blue with black, broad dorsal stripes and narrow humeral stripes. h orange, marked as in the male; but black is replaced by orange. Color of the abdomen is similar to the male; but paler. Segments 8 and 9 are also black with fine apical blue rings. Segment 10 is pale blue.
This species can easily be found near running water or still water. They usually rest on the plants either in the middle of ponds or at the water edges. It breeds in ponds, lakes and streams. It is entirely a species of the plains, being replaced by Pseudagrion malabaricum in the neighboring hills of Western Ghats of India and Sri Lanka, and by Pseudagrion australasiae to the north-east of India and Burma.
