Board Thread:General Discussion/@comment-7333961-20130915082209/@comment-3974711-20130915090000

Dragonfly's order is Odanata.

I think because when people hear the term Lepidoptera, they quickly associate it with flying insects. Odanata, while it would be more appropriate, doesn't register as easily. I think the Ben 10 crew was going more for a term that was already familar, rather than scientific accuracy. Anyway, they're aliens.