Bird Barrier Why, Can Jets Have Simply A Filter/barrier To Prevent Birds Getting Caught In Their Engines?

Why, can jets have simply a filter/barrier to prevent birds getting caught in their engines? - bird barrier

Certainly, thought someone this well before (I can not prove) one way or another. I wonder: If a fence to prevent birds absorbed, but the flow of air should the reactor can be fitted to prevent this performance? It looks like a cone filter can also be used to promote anything that the impacts of the road ... (Birds to stop crash planes)