Cuckoo Wasp (Chrysididae)

The Cuckoo Wasp has a metallic appearance whose colors range from blues and greens to reds and yellows. They lay their eggs in the nests of other wasps or solitary bees instead of building nests or collecting food. Once the Cuckoo Wasp's larvae hatch, they consume the host's eggs or larvae. 

Moreover, the Cuckoo Wasp has an armored body that can roll into a defensive ball when threatened.

Cuckoo Wasps live in lush forests and arid deserts. Their parasitic reproductive strategy also naturally regulates the population of their host species.