Answer: The bad omens of scavengers foreshadow his defeat
Explanation: In "The Tragedy of Julius Caesar" by William Shakespeare, the effect of this story told by Cassius is the bad omens of scavengers foreshadow his defeat. Cassius interprets the sign of ravens circling overhead the day of the battle as a bad omen for the battle's outcome. He thinks that the ravens, crows, and kites are looking at them as "sickly preys".