Some beetles and flies have antler-like structures on their heads, much like male deer do. the existence of antlers in beetle, fly, and deer species with strong malemale competition is an example of

This is an example of convergent evolution. These animals gained these similar antler structures to be able to survive in similar environments. Convergent evolution gives organisms who are unrelated similar characteristics as they evolve. The characteristics are influenced by the organism's similar habitats and are given to them to make sure the organisms are able to adapt to survive.