Jambo, Mr. Nature here–with a dragonfly that has a two-foot wingspan. Sometimes a little more.
Meganeura is prehistoric, so don’t worry about one flying into your car while you’re driving on the highway. Once upon a time, some insects grew to spectacular size (although not to the degree celebrated in assorted 1950s monster movies). Scientists think it was possible for them to grow so large because there was more oxygen in the air then than there is today. Mixing the air is God’s prerogative.
Dragonflies, totally harmless to humans, eat mosquitoes. As far as I’m concerned, we can never have too many dragonflies.