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Just saw a mouse outside my house, what could this mean? If you saw a mouse outside in your backyard, it’s likely not a cause for alarm as they are commonly found in the wild. However, if you observe multiple mice residing in your backyard, it could indicate a mouse infestation. This could potentially lead to food contamination and expensive repairs inside your home.

Just saw a mouse outside my house

Just saw a mouse outside my house

Generally, if you saw a mouse outside in your backyard, it is likely that they have also entered your home. There are several indications that you may have a mouse infestation that has extended inside your house from your backyard. Some signs may be more noticeable than others.

1. Damage to exterior structures

Mice can be destructive and will chew or rip apart anything within reach. If you see piles of shredded paper, clothing, furniture, or even wall material, it’s a sign of the presence of one or multiple mice that may have entered your property. Mice have teeth that continuously grow, and to keep them from overgrowing, they chew on various objects. Per the NIH’s National Institute of Dental and Craniofacial Research, mice wear down and completely renew their four front teeth, or incisors every 35 to 45 days.

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2. Mouse droppings

Mouse droppings are typically the first sign of a mouse infestation, however, the small size of the droppings makes it difficult to tell whether you have a large mouse presence outside. Note that mouse droppings pose a health risk and should be handled with care. Do not use a vacuum or broom to clean them as it may release toxic particles into the air that cause diseases like hantavirus. Wear a mask and gloves while removing the droppings.

3. A nearby nest

The presence of a mouse nest may not be a sign of a mouse presence outside your home. You should find the nest in dark areas such as the garage, basement, or attic. Mice build their nests with materials such as newspaper, cardboard, and soft discarded items found in your home. These nests serve as a breeding ground, allowing them to reproduce and quickly escalate into a significant infestation.

Is it normal to see a mouse outside your house?

This can be a surprising discovery. When you move a trash can, you may find a mouse or two scurrying along your foundation wall. If you open a box or shift something near your exterior walls, you may spot mice. There are many ways that you may encounter mice outside your home.

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It is normal to see mice or other rodents outside your home, especially if you live in an area with a lot of vegetation or close to fields or wooded areas. Mice are naturally curious creatures and are often attracted to homes that offer food and shelter. However, seeing mice outside does not necessarily mean you have an infestation inside your home.

It helps to take preventative measures, such as sealing up any holes or cracks in the exterior of your home, to prevent mice from entering and potentially causing expensive damage.

Should I be worried about mice outside?

If you only saw one mouse outside, you don’t have to be worried, except if you notice multiple mice in your yard, which could indicate that they may have also entered your home. Mice are small in size and can slip through small holes or cracks in walls into your home. Per the CDC, mice can fit through a hole the width of a pencil (1/4 inch or 6 millimeters in diameter).

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Some of their preferred nesting areas include the attic, walls, garage, and dark corners of your basement.

While outside your home, mice also play a significant role in the food chain. However, be proactive in preventing them from entering your home because they can carry diseases, cause structural damage, and contaminate your food.

How to get rid of mice outdoors

If you have noticed signs of mice activity or have seen a mouse outside, it doesn’t necessarily mean that they have entered your home. Nevertheless, follow these steps to protect your household.

1. Determine if they entered the property

To determine if mice have entered your property, do the following:

  • Check around electrical outlets, wiring, and pipes.
  • Look for any holes that are larger than a quarter.
  • Examine door sweeps.
  • Paying close attention to the corners.

Mice typically run along walls and they tend to try to gnaw through a weak door and break in through the lower corners. So, inspect your garage doors carefully to see if they ate through them.

Mice also gnaw on wood in moist, dark areas. If you have dark areas around your yard leading to the inside, get a flashlight for inspection and inspect areas such as under your deck, in crawl spaces, or behind shrubs.

2. Inspect your interiors too

You want to look for mouse footprints and scuff marks in areas with a layer of dust, flour, or sugar. Check these areas to look for evidence of mouse activity.

  1. Drawers and cabinets. Mice can hide in the backs of drawers and cabinets, so look for evidence (droppings or urine stains) near corners or behind objects.
  2. Behind furniture. Look behind furniture, your refrigerator, and other large items for their droppings and nest.
  3. The pantry. Mice do love your pantries, so inspect the walls in these areas for holes, especially in the lower places.
  4. Attic. Check your attics too. Use a flashlight to inspect the corners.
  5. Walls: Mice can burrow into walls. If you hear bumping and thumping sounds at night, it may be a sign of mice making their way into your home through the walls.

3. Keep the rodents at bay

Your next step is to take preventative measures to keep the mice from breaking into your home. Consider the following:

  • Make sure your trash cans are tightly sealed.
  • Store pet food properly between meals. Apart from mice, even cockroaches are attracted to your dog’s food.
  • Transfer pantry foods that come in paper or cardboard packaging to hard plastic containers.

With the tips above, you eliminate their food source, which will discourage their plans of infesting your home.

4. Keep your yard clean

While you eliminate food sources inside, you also want to keep your yard tidy to help get rid of potential mice hiding places. Do the following:

  • Regularly mow your grass and remove any tall weeds or piles of leaves.
  • Store wood piles away from your home.
  • Keep compost materials in a sealed container away from your property.

5. Set humane traps

Your next step is to set baited snap traps in areas where you have seen mouse activities. Place the traps along the walls and close to mouse paths, but away from areas accessible to pets and children. You can use snap traps for instant kill or buck traps to capture live mice to be disposed of.

6. Cover burrow openings

Mice also dig and burrow. Per the National Library of Medicine, mice dig in the ground to find food, hoard food, create a refuge from predators or cold, and make a safe nursery area for the young.

Your new objective is to find and cover the holes with rocks or dirt to prevent them from using these as entry and exit points. If you notice that the mice dug the opening again, it could be a sign of ongoing mouse activity.

7. Seal up

The next step is to seal up any cracks or holes outside your home. You can seal them with wire mesh or caulk to prevent mice from entering.

Ultimately, seek professional assistance if you suspect an infestation. Professionals have the knowledge and expertise to effectively protect your home from mice.

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