It's because Sauranath's power is very focused. He has cosmic awareness about everything to do with the Dragon Broods. Fire, Wind, Lightning, Water, Wood, Earth, and that sort of thing. He would know about wild life like snakes, or dinosaurs, that kind of thing being killed, but he wouldn't know about Humans and Cimex, and the Wi, because his power is basically being so high above the power of any dragon the way they are high above the power of a Human being with dwarfism. A Human being with dwarfism packing a shiv, not even a dagger or knife.