The largest group of insects that ever existed are the Meganisoptera (commonly but incorrectly referred to as Protodonata) or Griffenflies. They were predatory flying insects with wingspan of 12 – 75 cm. Like dragonflies, to which they were related, they had long narrow bodies, huge eyes, and strong jaws and spiny legs for grasping prey. … Continue reading 20 of the Largest Insects in the World