Mouse vs Rat Best 10 Main Differences Explained

Mouse vs rat

The House mouse, generally called mouse, is a rodent that belongs to the order Rodentia. It has the scientific name mus musculus. Mice live in grasslands, manufactured structures, and forests. Mice tend to have a thick body length of 3 to 4 inches. In addition, mice possess large floppy ears. These mouse ears are about 13mm long, while the mouse tail is 2 to 5 centimeters. The tail is of the same color as the body. The deer mouse is a rodent species in Eastern North America with larger ears. Another rodent species called Capybara is a large mouse with large ears. 

House mouse droppings are small, pellet-shaped with pointed ends. Mouse droppings are dark brown. These small mice droppings are about 1/4 inches long. The poop of the mice looks like a black grain 1/4 inches in length. The female mouse and a male house mouse reach sexual maturity at 4 to 7 weeks. Mice being omnivores, tend to eat fresh vegetables, fruits, and grains. Mice are known to eat dead bodies of various other mice. Mice get water from the food they consume and drink water if they need it. However, research has shown that the breeding mice named B6 mice may get bred greatly when pair-bred. Mice are very curious and investigate various new objects of environment. 

Both mice and rats are separate species. The common rat species are the roof rats or a black rat with the scientific name Rattus rattus, and Norway rats or a brown rat with the scientific name Rattus norvegicus. The Norway rat and black rat are small rat species. The black rat is also called roof rat; in contrast, the second name for the Norway rat is brown rat. The roof rat has a dark slender body. Also, the roof rat tends to live in higher places. In comparison, the brown rat is brown to a gray color and lives on every continent except Antarctica. They make their way near ground level and travel inside walls. The black rats or ship rats possess a body length of 190mm. Their body is sleek-looking and white.

Mouse vs Rat 

The Norway rat behavior is aggressive. The body size of rats is 6 to 11 inches with small ears. These little ears are hairless and are black, gray, white, or brown. The rat tails are usually scaly and hairy tails. Rat droppings are 1/2 to 3/4 inches long. Both mice and the rats droppings are smaller. The biggest difference between mice and rats is their body lengths. The young rat is known to eat almost anything, but the primary food source includes eggs, fruits, vegetables, meat, etc. 

The differences between rats and mice include that rat has more blunt nose than mice. The nesting areas of mice and rats are bathrooms, kitchens, and upper floors. Both are rodents and can cause extensive damage to your homes. They can chew electrical wires, causing a serious fire hazard. According to the board-certified entomologist to control pest problems, both rats and mice are still kings. Local technicians provide a way to solve rodent problem or control various pests, including rats or mice. Are rats worse than mice? Yes, they are worse than mice because of their large size. 



The mouse is present in various countries, including Africa, Eurasia, mainland Southeast Asia, India, and Sri Lanka. These animal species inhabit artificial structures, grasslands, and forests. They build burrows that protects from predators. 

Rats are medium-sized, thin-tailed rodents present in different countries such as Australia, Asia, and worldwide. These animal species inhabit suburbs, basements, woodlands, sewers, attics, dumps, barns, and sheds.

The adult mouse has a body length of about 3 to 4 inches from nose to base of the tail, and a tail length from 2 to 4 inches. In addition, the average weight is between 40 and 50 grams.

The different rat species possess body lengths from 8.8 to 10 centimeters. In addition, the average weight comes between approximately 19 and 23 grams.

Mice are omnivores, meaning will eat both animals and plants species. Wild ones eat grains, seeds, other plant materials, carrion, small vertebrates and invertebrates.

Rats are also omnivores like a mouse that can eat meats, veggies, and fruits. In addition to all this, the best rat diet consists of rat cube food, various vegetables, fresh fruits, and a small portion of rat pellets. 

As mice are nocturnal, they are rarely seen by various house owners. The primary indicators of these species’ presence include damage to stored food, the sound of their squeaking, gnawing and running, and droppings.

Like various other species and mice, these small creatures are also nocturnal. It means that they are more active during dusk/dawn and at night, providing great opportunities to climb the home cage.

Mouse has a good sense of smell, meaning they can quickly smell a little too fresh food. Their smell sense comes in hand while searching for something delicious to eat or friends. But their noses are greatly overwhelmed by strong botanical fragrances. 

Rats are highly smell-sensitive, according to research carried out by Harvard University. Sniffer rats are also present, like sniffer dogs trained to detect odors highly related to tuberculosis and even land mines.

Research has shown that mouse does not possess good eyesight yet have excellent hearing features. These animal species can detect high-pitched sounds for humans, helping them escape from various predators. 

As rats are colorblind, they also have very poor eyesight. Although they can see in two directions at once, the small, beady, and black eyes of these small creatures personate this great adaptation.

Mouse possesses four incisors, two lower mandibular incisors, and two upper maxillary incisors. They are naturally yellow-colored and much harder than human teeth. Their teeth never stop growing.

Rats tend to possess two types of teeth; the more typical molars and the ever-growing incisors. A thick layer of enamel coating in these incisors is in a state of continuous growth via continuous enamel development.

Mouse are called good climbers who can climb various vertical walls even the surface is shimmy and rough.

Rats are good climbers like a mouse, but are also excellent swimmers that has appeared to enter premises via toilet bowl’s water traps.

The mouse lives for a specific time, after which they die. For instance, the Africa pygmy mouse possesses an average lifespan of 2 years and 5 to 7 years for Pachyuromys duprasi.

Rats also have a short lifespan like other animals species. For instance, a Black rat lives for 12 months, while Brown rats have an average lifespan of 2 years. 

Various small mouse predators include owls, hawks, falcons, large lizards, snakes, ferrets, mongooses, foxes, ferrets, weasels, and cats.

Rats are afraid of various animals, including weasels, cats, dogs, Felines, birds, snakes, owls, hawks, and natural predators such as humans.


Sometimes people get confused and raise questions about mouse vs. rat to clear their minds. Therefore, the answers to some of those questions are as given below;

Are rats worse than mouse?

Rats being worse and more aggressive than the mouse species have higher risks of biting. However, they both carry rodent-borne diseases. 

Can a mouse turn into a rat?

No study shows the mouse growth into rats. They are completely different animal species.


Various animals are present worldwide, possessing unique facts and features for discriminating against them. The same is the case with a mouse vs. rat. These are completely different animal species, but people still confuse them. This blog post has provided exciting facts and information about these small creatures that are enough to make people’s minds clear. It will help if you read this article carefully. 

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