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Home / Rodent Guide / Mice vs Rats: How to Tell Which One Is in Your House
Most people never get a good look at the rodent in their house. Fortunately, mice and rats leave different clues, and those clues tell you a lot about where to look and how to deal with them.
By Spring Hill Rodent Pros \u{00B7} Updated November 11, 2026 \u{00B7} 3 min read
Mice are small, with droppings about 1/8 to 1/4 inch long, and they tend to stay close to food in kitchens, pantries and garages. Rats are much larger, with droppings about 1/2 to 3/4 inch long, and in Florida they often live in attics and climb. Mice can enter gaps about 1/4 inch wide; rats need a little over 1/2 inch.
An adult house mouse is small enough to fit in your palm, with large ears relative to its head and a thin tail about as long as its body. Rats are several times larger. In Spring Hill, the rat you are most likely to see is the roof rat, a slim, dark climber with a tail longer than its body. Read more about the two rat species in our guide to roof rats vs Norway rats.
UF/IFAS Extension gives typical dropping sizes for the three common pest rodents:
Before cleaning droppings up, read how to clean up rodent droppings safely.
Mice and rats need different approaches. Mice can enter through gaps about 1/4 inch wide, so sealing for mice means paying attention to small cracks around doors, pipes and the garage, according to ICWDM. Rats need a little over 1/2 inch, but in Florida they usually enter at the roofline. Trap size and placement change too: mouse traps go along walls near food areas, while roof rat traps go in the attic and along travel routes up high.
Some homes have both, especially older homes and properties with outbuildings. An inspection that covers both the roofline and the ground floor is the quickest way to be sure.
Yes. They often use different parts of the home, with rats in the attic and mice in the kitchen or garage. Each needs the right traps and sealing.
No. Young rats have larger heads and feet in proportion to their bodies and thicker tails than adult mice. Droppings and location usually make the difference clear.
Mice are easier to trap, but they can squeeze through very small gaps, so sealing a home against mice takes careful work. Rats are more cautious around new traps but need larger openings.
Call and tell us where you are and what you are hearing, seeing or smelling. A local rodent specialist can then set up an inspection of your attic, crawl space, garage and exterior.