Damselflies are carnivorous insects. They are good at preying on small flying insects in the air, but because of their small size and slow flight speed, damselflies mainly feed on tiny insects such as mosquitoes, flies, aphids, scale insects, psyllids, rice planthoppers and chironomids. Occasionally, soybean damselflies prey on damselflies. Lucky people may have a chance to see the same kind of damselflies who are hungry and scared.

Elephant. Dragonflies will prey on damselflies.

Oviposition behavior Because damselflies live in water, most females are used to stopping on rocks and sundries near the water, or attaching their eggs to plants standing on the water. A few special cases occur in rapids and streams.

Dive into the water and lay eggs on the edge of rocks or debris, such as the short-bellied clam. (damselfly's female is laying eggs on the driftwood in the stream) Look at the juvenile habits. Although the larvae of damselflies and dragonflies are both called "hydra", they are easy to distinguish from each other in appearance, because most damselflies have three obvious leaflike or fleshy tail gills on their tails, which can be used for paddling and swimming in case of emergency, so as to avoid the enemy's injury. After hatching, Hydra damselflies prey on other weak aquatic insects or planktonic arthropods to survive in the water.