Mostly the bugs, isn't it?

[Though his own daughter's purpose was to one day kill her mother, so--maybe the psycho has a point. Maybe he's not such an abnormality, either. Cain is disgusted by him but the more he watches the more fascinated he is. Probably that's part of how Hannibal has survived this long.]

The pests, the ones humans would exterminate if they weren't so busy?