Keep in mind, though, that dragonflies don't have a stinger, so they won't sting you. They do, however, have teeth. ... Dragonflies aren't an aggressive insect, but they can bite out of self-defense when they feel threatened. The bite isn't dangerous, and in most cases, it won't break human skin.
Do dragonflies bite yes or no?
Do Dragonflies Bite or Sting? No, although large dragonflies, if held in the hand, will sometimes try to bite they fail to break the skin. They have a lot of “folk names” which imply that they do, such as “Horse-stinger”, but they don't use their egg-laying tube (ovipositor) for stinging.
Are dragonflies friendly to humans?
In truth dragonflies are harmless to humans – unless you force your finger into their mouth. A large golden-ringed dragonfly once gave my father's finger a bloody nip as he held it for me to photograph. But dragonflies certainly can't sting you, and they won't bite you unless severely provoked.