Rat Identification
Evidence and where to look.
Resources
Rat vs. Mouse: How to Tell the Difference
The answer changes the plan, so it is worth getting right.
Short answerMice are small with large ears and rice sized droppings. Rats are much larger with a blunt nose, thicker tail and larger droppings. If you find droppings, their size is the fastest clue.
Rat and Mouse Comparison
| Feature | Mouse | Rat |
|---|---|---|
| Body | Small and slim | Much larger and heavier |
| Head and ears | Small head, large ears | Blunt nose, smaller ears for body |
| Tail | Slim | Thick |
| Droppings | Small, about the size of a rice grain | Larger and blunter |
| Usual location | Indoors, kitchens, walls, behind appliances | Burrows, basements, ground level, garbage areas |
| Entry | Very small gaps, about a pencil width | Larger gaps at foundations, pipes and doors |
Quick Comparison
The table above summarizes the main differences. Photographs and a description of where you found the evidence help an inspector confirm.
Why It Matters
Rats often start outside, in burrows and at the ground line. Mice tend to be inside, in kitchens, walls and behind appliances. The plan, materials and follow up differ. See rat control and mouse control.
Young Rat or Adult Mouse?
A small rat can look like a large mouse. Head size, foot size and droppings help. If you are unsure, take a photo and schedule an inspection.
Not sure what you are dealing with? An inspection finds the source and sets the scope.
Questions and Answers
How can I tell a rat from a mouse?
Droppings and size tell most of the story. Mouse droppings are small, about the size of a grain of rice. Rat droppings are noticeably larger and blunter. Adult mice are small with large ears and a slim tail. Rats are much heavier with a blunt nose and a thick tail. The difference changes the treatment, so it is worth getting right.
What are the noises in my walls or ceiling?
Scratching, scurrying or gnawing that gets louder at night often points to mice or rats. Pipes, settling and other animals can make noise too. Heavy thumping in the daytime may suggest a larger animal, which is outside our rodent work. Noting when and where you hear it helps an inspector narrow down the source.
Last reviewed 2026-09-21. Time sensitive NYC rules and processes change, so check the linked official pages before you act.