...as most of us will go "Yuck", when we see views like this. But hold on, as these are not ordinary flies, and we will unlock another secret in nature, to show you how beneficial these yucky

Dangle, slurp, repeat may help the insects protect their brains from overheating UNUSUALLY COOL If this blowfly starts overheating, it has a drool, reswallow, repeat trick for reducing its temperature.