What is the significance of the unnatural omens that occur around the time of Duncan's murder?

The unnatural omens surrounding Duncan's murder in Shakespeare's "Macbeth" symbolize the disruption of the natural order and foreshadow the chaos that follows. These signs, such as the darkness during the day and the strange behavior of animals, reflect the moral and social upheaval caused by Macbeth's ambition and regicide. They serve as a warning that violating the natural order leads to dire consequences, highlighting the theme of fate versus free will. Ultimately, these omens underscore the tragic impact of Macbeth's actions on both the kingdom and his own psyche.