This is a cool concept:

British scientists are developing a robot that will generate its own power by eating flies.

The idea is to produce electricity by catching flies and digesting them in special fuel cells that will break down sugar in the insects' skeletons and release electrons that will drive an electric current.

The purpose is not to decimate fly populations but rather to create robots for remote tasks (like sewers) which need zero maintenance because they generate their own power. Pretty cool idea actually.

They just need to make one that eats mosquitos.