Easily Observable Signs of Rodent Infestations

Rodents are known to carry diseases, damage property, and consume your hard-earned resources. They rarely work alone, and it is not uncommon for homes to experience large infestations over extended periods of time. This prospect can be terrifying to many homeowners, but there are tried and true ways to tell whether or not you may be facing a rodent problem. If you feel that that your home may be harboring rats or mice, you may want to look for the following signs.

Unexplained Noises

If you have ever heard inexplicable scratching noises coming from your ceilings, walls, or attic, you may be facing a rodent problem. Rats and mice live inside these spaces, and are especially active at nighttime. Many rats are exceptional climbers, and can easily find their way into the upper floors of your home or building. Since rodents almost always live in groups, it is not uncommon to hear scurrying as well. Rodents also make a rather loud grinding noise, known as bruxing, with their teeth.

Bite Marks

Since rodent teeth never stop growing, they are faced with the constant need to trim them down. Rodents gnaw a wide variety of materials in order to keep their teeth at a comfortable length, and they are known to chew on household objects and furniture. They also have the potential to start fires if they chew through freestanding electrical wires. Look for signs of bite marks around your house if you suspect that you may have an infestation.


Rodents enjoy building nests in warm, unnoticeable places using shredded materials. Paper, fabric, and other soft materials are commonly used to construct these nests, and they are usually placed close to the main food source. These nests commonly contain young rodents, and can sometimes be found behind appliances such as refrigerators, stoves, and dishwashers. If you notice a nest, you should definitely contact an Arizona pest control company before the problem worsens.


Rodents love to burrow, and commonly build extensive tunnel networks for shelter, nesting, and storing food. These tunnels are usually located outside, underneath sheds, decks, and gardens. It is important to contact a professional as soon as you notice these tunnels, since they more than likely contain multiple rodents. The brown rat (most common North American rat) is the best at tunneling, and their elaborate structures are used to move between areas.

Marks and Smudges

Rodents have exceptionally poor eyesight, and they establish routes along walls and baseboards in order to compensate. These routes make navigating easy, but they leave behind grease and dirt marks from their bodies. These smudges and dark marks are easily observable with the naked eye, and are a sure sign that you may be living with rodents.


If you have ever noticed fresh rat droppings, you may be facing a current rodent problem. A single rat can leave behind up to 40 droppings a day, and these droppings are typically found in concentrated areas. If you notice these excrements around your home, it is definitely time to contact an before the problem worsens.

Call a Professional

In summary, there are many noticeable signs of a rodent infestation. If you notice any of these signs in your home, you should contact a professional immediately in order to understand the full extent of your problem. If you do this promptly, rodents will never have the opportunity to take over your home.

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