Are Dragonflies Beneficial Insects? A Look at Dragonfly Predatory Habits and Ecological Value

Dragonflies are typical beneficial insects. Whether as adults or larvae, dragonflies live by preying on other small insects. Adults mainly catch flying pests such as mosquitoes, flies and moths in the air, and a single dragonfly can eat a large number of mosquitoes in a day, which is very helpful for controlling mosquito and fly populations.

Dragonfly larvae, commonly known as water nymphs, live in waters such as ponds, rice paddies and ditches, feeding on wrigglers, that is, mosquito larvae, and small aquatic insects, and they likewise play a role in killing pests. It can be said that from growing in the water to emerging and taking flight, dragonflies spend their whole lives helping to wipe out pests.

From an ecological perspective, dragonflies are natural pest-killing experts in fields and by the water, able to help reduce mosquito and fly breeding, benefiting both agricultural production and people's living environment. At the same time, dragonfly larvae are relatively sensitive to water quality; a large number of dragonflies in a body of water often indicates that the local water quality and ecological environment are in good condition, so dragonflies are also often regarded as one of the indicator insects for environmental quality.

It should be noted that dragonflies do not bite people or chew on crops, and apart from occasionally giving a pinch with the appendages at the tip of the abdomen when caught by a person, they are basically harmless to humans. Because dragonflies have many benefits, do not casually catch them or harm them with pesticides; protecting waters such as ponds and rice paddies is also preserving habitat for this beneficial insect.