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Dragonflies are helpful to humans because they eat flies and midges and many other irritating insects that accumulate in large numbers where we do not want them. They are not harmful at all to us.
Wiki User
∙ 15y ago
Wiki User
∙ 16y agoDragonflies are a ferocious predator of the insect world, devouring other insects. They have been around since before dinosaurs and are an integral part of many ecosystems. They are not harmful to humans.
Wiki User
∙ 10y agoBoth. They're completely carnivorous and may eat herbivores that are plant pests, but also pollinators that help the plant reproduce. I've seen them feast on aphids (pests) but also hoverflies (helpful) and butterflies (caterpillar is harmful, adult can be helpful).
Wiki User
∙ 14y agoSince they don't eat plants or sting people, but they do eat mosquito larvae and mosquitoes, I'd say they are basically helpful
Wiki User
∙ 13y agoThey are helpful. Dragonflies kill mosquitos and black flies, which can be beneficial.
Wiki User
∙ 12y agoI dont know but this dang website should
Anonymous
no they help us by eating insects such as moscitos
Anonymous
Yes
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