Devilfly

Devilflies are a group of dragonflies that are descended from Meganeuras that were brought back from extinction, then being genetically engineered to tolerate low oxygen levels as well as predation and competition. Devilflies are the largest insect on Earth, depending on a subspecies, around the size of a pigeon to the size of the very large golden eagle. They are all aquatic flightless and wingless omnivores in their larvae stages, but becomes fully carnivorous flighted and winged carnivores after metamorphosis into adults. They are very abundant and are in no risk of going extinct, being found in every biome (including human settlements) except in tundra, where it is too cold for them to live.