What is Difference between wild mouse and mice, and how to get rid of them

Mice are known to live in the homes we live in and cause various harm. These mice are grouped together as “house mice”, but in addition to these house mice, mice called ” wild mice ” are distributed in Japan.
Who the hell is this wild mouse? In this column, I will focus on this and that of such wild mice.

What is a wild mouse? Difference from the mouse that comes out at home

Speaking of mice, there is an image that they live in the attic of our house and do harm to people. In fact, these mice are called ” house mice ” and are the mice that live in our living area.
So what is the difference between a mouse called a wild mouse and a domestic mouse?

Wild mice are “wild” mice

Wild mice are a general term for ” wild mice ” in a nutshell. House mice, which usually do harm in our lives, live in human life, such as in the attic and sewers of our houses. On the contrary, a wild mouse is a mouse that lives in places such as wild mountains where vegetation grows thick and there are many places to hide.

Characteristics of wild mice

Mice are highly adaptable to the environment and have high learning abilities. Another characteristic of wild mice is that they are nocturnal and often act alone.
Wild mice are also omnivorous and live on small insects, earthworms, and other soil animals, as well as grass and nuts.

Wild mice’s natural enemies are larger carnivores than themselves

House mice live in the living area of ​​humans, which has relatively few natural enemies, whereas wild mice live in the natural world, which has many natural enemies. For example, it is also a source of nutrients for carnivorous animals such as weasels, martens, and cats, birds of prey such as owls, and reptiles such as pit vipers.

Wild mice have a short lifespan

House rats live for about 1 to 2 years, but wild mice have a short life expectancy of about 3 to 4 months. This is related to a large number of foreign enemies of wild mice. For example, even if you are lucky enough to survive, if you are found by a foreign enemy, you will be preyed on and die.

The actual type of wild rat

Wild mice are a general term for mice that do not live within the living area of ​​humans. So what are the different types of wild mice?
Next, let’s look at the types of wild mice.


The mouse is a part of the house mouse, but at the same time, it is also a wild mouse and inhabits fields and grasslands. It is also a characteristic of mice that they live in the living area of ​​humans, which is relatively close to nature.

Mice are about 6-10 cm long and weigh about 10-30 g, their backs are white, gray, black, brown, etc., and their abdomen is light in color. Although the mouse is small, it has jumping power and seems to be able to fly up to 40 cm.

Japanese field mouse

The Japanese field mouse is endemic to Japan and inhabits all over Japan from Hokkaido to Kyushu. The body color is a two-tone color with orange-brown on the backside and white on the ventral side from the mouth to the tip of the tail. It weighs about 20 to 60 g, has a head and torso length of about 8 to 14 cm, and has a tail length of about 7 to 13 cm.

Also, it seems that they live everywhere from lowland grasslands all over Japan to mountain forests over 2,000m. It is nocturnal and mainly feeds on plant seeds and rhizomes, but it can also prey on insects. It is characterized by well-developed hind leg muscles, and its range of activity may extend several kilometers a day.

Small Japanese field mouse

The Japanese field mouse is a miniaturized mouse, and its habitat extends throughout Japan as well as the Japanese field mouse. It can be said that the appearance feature is that the tail length is longer than the head and body length.

Since the body is small, it is disadvantageous to live in the same place as the Japanese field mouse, but it seems that they are separated by living on a tree where the Japanese field mouse cannot climb.

Harvest mouse

The harvest mouse is the smallest mouse in Japan and one of the smallest in the world. Its size is about 5 to 8 cm in head and body length, about 5 to 9 cm in tail length, about 7 to 14 g in weight, and it is said to have a lifespan of about 1 to 2 years. The back is orange and the abdomen is pure white.
There are no examples of discoveries in the Tohoku region or the Nansei Islands, but they have been discovered little by little in other regions, and it seems that many have been discovered in places relatively close to the city center.

It has long been considered a vermin that feeds on rice, but recent research has revealed that there is no such fact. I mainly eat weeds such as Japanese millet. It is also famous for making round nests like small birds in the grasslands.


Voles live in riverbeds, upland fields, and lowland grasslands. The size is about 9 to 13 cm in head and body length, about 3 to 5 cm in tail length, and about 20 to 60 g in weight. The coat color on the back is brown or grayish yellow-red, and the abdomen is grayish-white.
I live by digging a mesh-like burrow in the ground about 50 cm. It is also famous for occasional outbreaks.

Smith’s vole

Smith’s vole is endemic to Japan, and its habitat is distributed in Honshu, Shikoku, and Kyushu up to the southern part of the Tohoku region. The head and trunk length is about 7.5 to 11.5 cm, the tail length is about 3 to 5.5 cm, and the weight is about 20 to 35 g. It seems that they feed on the roots, stems, and seeds of plants. Due to its preference for calcareous soils, it can occur in Shikoku, which is suitable for this condition.

Ezo yachin rat

Myodes Rufo can is a mouse that is distributed in Hokkaido and the surrounding archipelago. The head and body length is about 10 to 14 cm, the tail length is about 4 to 6 cm, and the weight is about 27 to 50 g.
It is basically herbivorous, eating bark and seeds from autumn to spring, and eating other plants in summer.

Types of house mice

In addition to wild mice that live in the wild, there are also so-called house mice that live in houses within the human living area. Now let’s see what kind of mouse there is in the house mouse.

Rattus norvegicus

The black rat is a mouse with a body length of about 15 to 25 cm and a weight of about 100 to 200 g. The body color is brown or black on the back, and the abdomen has a light shade such as gray or white. Another characteristic of the black rat is that it has large ears and a long tail.

Its personality is so vigilant and timid that it quickly escapes when it sees a human. Since the black rat is good at vertical movement, it can freely move to and from high places such as the attic through pipes.


As I introduced when it comes to the types of wild mice, some mice live in their homes. With its small body, you can easily enter narrow places. Mice, which are often found even in the wild, often nest in warehouses adjacent to fields rather than in the homes where humans live.

Rattus norvegicus

The brown rat is a mouse with a body length of about 18 to 28 cm and a weight of about 150 to 500 g. The body color is gray or taupe, and the chest is whitish. One of the features is that the ears are smaller than other mice. It lives mainly in dark places such as sewers and is good at swimming. Due to his harsh and ferocious personality, he may be bitten and injured if approached easily.

What is the damage caused by mice?

Wild mice seem to have less opportunity to interact with people than home mice. However, when asked to go within the living area of ​​a person, that is not the case. In recent years, deforestation has continued, and the range in which wild mice can live is narrowing. In addition, if the food for wild mice disappear from the territory of wild mice, they may travel to the living area of ​​humans and damage crops, trees in the garden, and even Kayama. Here, let’s take a closer look at the damage caused by mice.

Damage to agricultural products

One of the damages to wild mice is the feeding damage of crops. Mice are basically omnivorous and seem to eat vegetables and fruits grown in the fields.
This also applies to other wild animals. For other animals, you may be able to take measures such as electric fences. However, since wild mice have a small body, they can invade and eat if there is even a small gap.

Damage to trees, etc.

Wild mice chew hardwood to adjust the length of their anterior teeth in order to maintain their anterior teeth. As a result, trees can rot from the scars of wild rats.

Damage to houses, etc.

When a mouse invades a house, it causes various damages. The first is the dung damage that occurs in the attic. Since the attic is narrow and hard to reach by humans, it will accumulate dung and breed fungi and mites. Furthermore, it is possible that the building materials of a house will rot due to the accumulated dung and urine.

In addition, mice have high fertility and give birth to about 5 to 10 children at a time, so the number increases in a blink of an eye. If that happens, the damage speed will be faster and the scale will expand.

In addition, rat damage has a negative impact not only on the home but also on the human body. When a mouse invades the living space of a house, it may be possible to chew human food, chew humans directly, or run around the kitchen. Mice carry various pathogens and can cause health problems.

In particular, mice are dangerous, whether they are wild mice or home mice.

The mouse is one of the three major Japanese mice, and the more you see it in your life. It may be seen less often than the brown rat and the black rat, but it is one of the mice that harms people, as the name of a domestic mouse.

Like other mice, it carries pathogens and devours food and household goods, but what you should be especially careful about is its fertility. Mice have a short gestation period and growth period, give birth to about 7 mice in one birth and give birth multiple times in a year.
Even though there were only a few mice, I noticed that the number had increased to dozens or hundreds.

Get rid of mice that are harmful to humans

In order to protect our safe life, let’s get rid of wild mice that harm people such as mice as soon as possible.
An effective method of extermination is to use an adhesive sheet or rodenticide. Since it is a method of killing a mouse directly, if the extermination is successful, even the dead mouse must be dealt with.
However, for those who don’t like mice, dealing with mouse carcasses can be a daunting task.

If you don’t want to get rid of the dead mouse, why not ask a mouse extermination professional to get rid of it? Depending on the vendor, there are some places that accept requests from as low as 8,000 yen.
If you want to know the detailed cost, please ask the vendor for a quote.

Is maintenance of plants effective as a countermeasure against wild mice?

Wild mice are the bottom animals in the food chain and usually live in places where they can hide. The place where plants such as crops are grown is often shaded, so it is a perfect feeding ground and hiding place for wild mice. In order to reduce the feeding damage caused by wild mice as much as possible, we will maintain the plants on a daily basis and make an effort to eliminate the place where the wild mice hide.
Pull out particularly useless weeds, and if you want to leave undergrowth, mow until you can see the ground.


Unlike domestic mice, wild mice do not live within the living area of ​​humans but live in fields such as Aoyama. Compared to domestic mice, there is an image that they are free from fear from humans and live freely, but the opposite is true, and because they are in the natural world, they are preyed on by many natural enemies.

Compared to such house mice, wild mice have less chance to interact with humans, but in fact, they may eat crops and trees. In addition, the mouse, which is also known as a domestic mouse, seems to be also known as a wild mouse.
It’s fine as long as there is no harm to humans, but once visible damage has occurred, the damage cannot be left unattended.
If you are having trouble with mouse damage, ask mouse extermination professional to solve your problems with mice.