You have discovered mice droppings in your cupboards. Food is spilling out of packages in your pantry because holes have been nibbled in them. You’re catching whiffs of an unpleasant odor. It’s obvious mice have come to live with you. As far as guests are concerned, these are definitely the unwanted kind, and you want them gone. You know there are different kinds of mice. How can you tell which kind is in your home? The odor is stronger in the upper rooms and attic. Do the mice sleep there and travel your kitchen at night to eat? Or do you have more than one kind of mouse setting up housekeeping in your home? Keep reading for answers to your questions.

There Are Dozens of Different Kinds of Mice

Many kinds of small rodents are commonly called mice. Some people identify the different kinds of mice by their coloring.

The common colors by which they name mice are:

  1. Black,
  2. Brown,
  3. Grey.

Black, brown and grey mice

The fact that mice can be more than one color in the same species makes coloring less than accurate for identification.

It’s Hard to Distinguish One Mouse Species From Another

Other people look at behavior and distinguish one kind of mouse from another that way. Some mice eat as soon as they find food. Others store their food. While not fool safe, mice behavior is a more reliable method of identification than color.

As it happens, mice are opportunistic eaters. They have their preferences, and when food is abundant, they are herbivores. But a hungry mouse will eat anything it can find. When they’re in your home, you generally only know they’ve been in your food, and not necessarily which kind of mouse has invaded.

Two Kinds of Mice Like to Live in Your Home

Of all the different kinds of mice, you’ll commonly only find one of two kinds dining in your home.

These are:

  1. House mouse,
  2. Deer mouse.

A third kind of mouse that you may find on your property is the field mouse.

Mice: house, deer and field

Of these three, only the house mouse carries the scientific species name of Mus musculus. Other small rodents that look like mice are actually different species. All of them are pests that can carry disease and contamination into your home. You’ll find more facts about mice in this article.

Deer Mouse vs House Mouse: Which Is Which?

A deer mouse looks like a house mouse to many people, but there are differences. A house mouse is usually one color, although the color is lighter on their undersides than their topsides.

Deer mice are distinguished by white feet, legs, and undersides. Their tails are white on the underside. The hair on the rest of their body is often gray or brown. A deer mouse has larger eyes and ears than a house mouse has. It is also slightly larger, measuring about seven to nine inches from head to tail. A house mouse is about five inches from head to tail. Both have poor eyesight and rely heavily on their senses of smell and hearing to find food or evade predators.

Quick stats of house and deer mice

Deer mice prefer to live in rural areas rather in the urban areas that house mice prefer. However, both species are adaptable and can be found anywhere. A house mouse will eat food wherever it finds it. The deer mice are gatherers and store their food supply. Neither hibernates.

Mice Are Almost Everywhere

Mice are classified into six families, with more than 1,000 species. They have adapted over the ages to live everywhere there are humans, with the exception of Antarctica. Although mice do live in cold climates, they prefer warmth and seek shelter indoors.

Species of mice found throughout the United States include, but are not limited to:

  • Cactus Mouse.
  • Cotton Mouse.
  • Harvest Mouse.
  • Northern Pygmy Mouse.
  • Plains Harvest Mouse.
  • Salt-Marsh Harvest Mouse (on the endangered list and protected in California).

Every state has one or more species living in it. Some mice are so localized that they are named after their location, such as the California Pocket Mouse. Others are found nationwide. The mice are similar in appearance, but differ enough genetically to be individual species.

Will Deer Mice Invade My House?

Like any other species of mouse, a deer mouse will enter your home in search of food and shelter. They are adept at climbing. They can get inside by crawling up downspouts, trees, or vines to get into attics. They also like basements and crawl spaces. Deer mice build their nests in corners or inside unused furniture, boxes, or equipment.

Mice nestDeer mice like spacious living quarters. Their nests can be a foot or more in diameter. Outside, the nests are built with sticks, leaves, and other debris. Inside, mice construct their nests from whatever stuff of yours that they can shred.

That includes, but isn’t limited to:

  • Papers,
  • Pieces of cloth,
  • Insulation,
  • Stuffing from your upholstered furniture.

Deer mice line their outside nests with fur or feathers; inside, they use the softest materials they can scrounge.

They Poop Where They Eat and Sleep

If a mouse infestation isn’t disgusting enough, deer mice use their nests as toilets. Within a few weeks, the nest becomes too nasty to inhabit. The female mouse then just builds a new nest nearby. You end up with a collection of foul-smelling abandoned nests. As these nests dry, they can become home to Hantavirus. If you’re removing nests, you must wear gloves and a mask. Avoid disturbing the nest enough to raise dust.

Which Kind of Mouse Is in My House?

Mice are nocturnal, which makes them hard to find during daylight hours. You usually have to identify which kind you have by the signs they leave.

Three primary signs are:

  1. Droppings.

    House Mouse Droppings

    House Mouse Droppings
  2. Kinds of foods eaten.
  3. Nests.

Knowing which kind of mouse is infesting your home is one of the keys to exterminating them.

Since deer mice defecate in their nests, if you see a lot of droppings in drawers, cupboards, and other places where food is stored, the scales tip toward an infestation of house mice.

Another sign of house mice is the type of food being eaten.

House mice foodThey prefer high fat and high protein foods, such as:

  • Butter,
  • Chocolate,
  • Meat,
  • Sweets.

You’ll see where they’ve nibbled on your food.

Deer mice prefer:

  • Deer mice foodFruit,
  • Greens,
  • Insects,
  • Nuts,
  • Seeds.

Deer mice usually choose to gather food and store it to eat later rather than eating it where they find it.

The above lists and habits are their preferences. When hungry, any species of mice will eat whatever it can find, wherever it finds it. But if you discover caches of food, you more than likely have deer mice rather than house mice. What do mice eat? Read here.

A House Mouse Nest Is Different From That of Deer Mouse

If you can locate a nest, you’ll have definitive evidence of which kind of mouse is keeping you company. As described above, the deer mouse builds large nests. A house mouse constructs much different looking nests. Their nest is much smaller, rarely more than six inches in diameter. The nest looks rather like an untidy ball or pile.

Mice nests

House mice use the same nesting materials as deer mice use. They build their nests between walls, beneath appliances, and inside or under furniture. All mice try to nest in hidden or dark spaces. They almost always construct their nests within 30 feet of their food supply. Both kinds give birth in their nests.

Baby mice born blind, deaf, and with bald pink skin.

Neither species of mouse is clean. House mice aren’t quite as dirty as deer mice are. House mice usually defecate and urinate outside the nest, rather than inside it as deer mice do.

What Does a House Mouse Look Like?

House Mouse

House mouse

House mice can be brown, gray, or black. Brown predominates. Their hair is short. They do have hair on their ears and tails, but it is so short and fine that they appear hairless in those areas. They have round “Mickey Mouse” ears and beady eyes. House mice have pointed snouts. Their tails are as long as their bodies. An adult house mouse rarely weighs more than an ounce.

Although house mice can be mistaken for baby rats, there are distinctive differences. The head of baby rats is wedge-shaped rather than pointed. Their tails are also not as long as their bodies. Their feces is differently shaped and sized. For more information on rats vs mice, read this article.

What Is the Difference Between a House Mouse and A Field Mouse?

Deer mice and house mice are the two different kinds of mice that you’ll find inside your home. There is another common kind of small rodent called a field mouse. Because house mice can live outside if they have to, they’re sometimes incorrectly called field mice.

Field Mouse

Field mouse

Field mice are smaller than house mice. A field mouse has large eyes, rather than beady eyes. You can learn more about the appearance and behavior of a field mouse here.

Any kind of mouse in your home is a problem. They carry disease, contaminate your food, and destroy your belongings. Once you learn to identify which of the different kinds of mice have invaded your home, you can take steps to eliminate them. One way to keep all mice away is to seal any opening by which they can enter. Even the larger size mice can enter through openings as small as one-fourth inch. Once inside, you’ll need to use different techniques to evict your unwanted guests.

You can find further details of Mice Control here.