We all know that the world in which insects inhabit is a brutal. But even many entomologists are not aware of just how far the sadistic tendencies of some species of insect can really go. Take the Dhorniphora genus for example.
Very little is know about these tropical flies, which are from central america, but one thing that entomologists have recently discovered about these flies is that they take an enjoyment in decapitating injured ants. The females of the decapitating species possess a bladed appendage that insures quick and gruesome death to any ants that may be around.
However, these severed head-loving flies don’t just decapitate any old ant indiscriminately. Instead these sadistic flies will look on as groups of ants go to war. Once the widespread violence subsides the flies will then move in and find an ant, or many ants, that are injured, and therefore incapable of self defense. It is necessary for the murderous flies to find ants that are injured because normally ants are the ones that kill the flies. I guess even insects have the capacity for vengeance.
Could there be a practical reason as to why these flies decapitate ants rather than mer