Answer:
Calpurnia reports to Caesar that lions give birth in the streets, the dead rise from their graves, and that soldiers fight in the sky as blood rains upon them all. She also claims that the battlefield around them provides sounds of shrieks, groans, that horses neigh and that soldiers suffer. Besides, Caesar's statue is full of holes and is pouring blood.
Similarly, when Calpurnia says that "When beggars die, there are no comets seen; / the heavens themselves blaze forth the death of princes," she means that when unimportant people die, it is not big deal. However, when someone as great and important as Caesar dies, it could not matter more.