He is one of the strongest members in the insect kingdom in terms of flying ability, known for his agile flying skills and hunting ability. The body size ranges from small to large, and is divided into three parts: head, chest, and abdomen. The head usually has a pair of large and prominent compound eyes, providing excellent visibility. The wings are transparent or semi transparent, with two pairs, the forewings and hindwings, which can quickly adjust the angle during flight, achieving high difficulty movements such as hovering, quick turning, and diving in the air. Larvae live in water and feed on small aquatic animals, while adults prey on other flying insects in the air. The hunting method is very unique, able to chase and capture prey in the air.