How to Tell Rat Droppings from Mouse Droppings

Q: We found animal droppings in our kitchen. My husband says mouse, I say rat. Can you tell the difference?

Yes, by close examination:

• Mouse droppings: Resemble black grains of rice, ~¼ inch long, pointed ends.
• Rat droppings: ½–¾ inch long. Shape distinguishes species:
  • Norway rat: blunt ends.
  • Roof rat: pointed ends.

Both rat species are common in Atlanta. The photos below illustrate the differences.