Rodents are nocturnal, cautious, and skilled at hiding. But their activity can be uncovered by paying attention to subtle clues.
Keep an eye out for droppings near food packages, in drawers and cupboards, or underneath sinks. Also, look for gnaw marks on furniture, electrical wires and insulation. Foul odors are another indicator of rodent activity, as is the sight of greasy rub marks on walls and baseboards.
Rodents need to gnaw to keep their teeth from growing too long, and they’ll target just about anything in your home. Look for gnaw marks on furniture, electrical wires and insulation. Heavy scratching noises, especially at nighttime, could also indicate rodent activity.
The type of chew marks you find will help you identify the species causing them. Mouse droppings are small and pellet-shaped, resembling grains of rice, while rat droppings are larger and elongated. Fresh droppings appear dark and glossy, while older droppings turn gray and crumble easily when touched.
Gnaw marks themselves aren’t enough to confirm a rodent infestation, but they should prompt you to search for other signs of a rodent problem. Check for food crumbs in hidden places like cabinets or drawers. Look for wood shavings or shredded paper around chewed furniture and electrical wires. Also note whether there are torn shingles or other roofing materials in the area. Squirrels often chew wood and plastic to work on their nesting materials, while raccoons may gnaw through metal pipes or to access food in trash bins.
In addition to gnaw marks, you might also notice a foul, musty smell or hear scurrying and scratching sounds in the walls or ceiling. Certain diseases spread from rodents to humans through direct contact or through the bites and scratches of fleas, ticks and mites that feed on infected rodents.
Look for shredded material that resembles mouse nests in closets or wall voids, and keep an eye out for tiny piles of discarded plant materials near the roof or in crawl spaces. The shredded material is used to line the nests that mice create in attics and other nooks, while brown rats often build theirs in basements or in wall ductwork.
2. Smells
Rodents leave behind droppings and urine, which give off a distinct musky smell. This odor intensifies in confined spaces and areas where rodents are most active.
Mice and rats also shred soft materials like paper, cardboard, and even lace tablecloths to line their nests in attics and lofts. The resulting decomposition smell is also an indication of a rodent infestation.
Another telltale sign of a rodent infestation is the presence of an ammonia-like odor. Mouse urine contains urea, which breaks down to produce ammonia when exposed to air over time. This pungent odor often wafts through attics, crawl spaces, and basements. It is especially strong in places where mice congregate, such as beneath cabinets and along baseboards.
In addition to a musty or fishy scent, rodent urine can also spread harmful bacteria and viruses. These bacteria and viruses can be spread to humans by breathing in contaminated air, touching contaminated objects, or eating food contaminated by rodent droppings or saliva. The most common diseases transmitted by rodents include rat-borne plague, salmonella poisoning, leptospirosis, hantavirus pulmonary syndrome, and other respiratory illnesses.
Some of these diseases can also be spread by ticks, mites, fleas, and mosquitoes that feed on infected rodents. The best way to protect against a rodent infestation is to keep an eye out for signs of rodent activity, including droppings and gnaw marks. This will help prevent the infestation from spreading and posing health risks to you and your family. If you notice these symptoms, contact your pest control professional immediately to take control of the problem and protect your home from further damage.
3. Tracks
Rodents move around on a regular basis in search of food, water, and shelter. These pests leave behind a trail of evidence that may help you identify the type of rodent and its activity level. Look for tracks, droppings, gnaw marks, and nesting areas to find out whether mice or rats are occupying your home.
Tracks in the Snow
The arrival of winter weather often drives mice and rats indoors, where they can take refuge from cold temperatures and harsh conditions. Fortunately, spotting rodent snow tracks can be one of the first warning signs that you have an infestation problem, and it’s important to act quickly before these pesky critters invade your home.
Rats are excellent diggers, and they burrow through dirt to reach a home’s foundation and walls. This can lead to deterioration of the home’s structure and increase its vulnerability to moisture, wind, and other environmental factors.
To help you spot rat tracks, examine the shape of the footprints and the spacing between the toes. The front feet of a rat have four toes, while the hind feet have five. Additionally, the front rodent tracks are broad while the hind ones are narrow and more long. For a more precise identification, you can use tracking powders or ink pads.
Once inside a building, rodents search for food, water, and shelter in hard-to-reach spots. This includes attics, basements, insulation, and wall voids, as well as tight spaces where they can hide, such as behind walls. They also gnaw on wires, which can cause dangerous electrical fires and weaken wood structural components. In addition, these pests can spread disease and contaminate food supplies. Ignoring mouse or rat tracks, droppings, and gnaw marks can allow them to breed rapidly and cause serious damage over time.
4. Nests
Rodents need to chew constantly to keep their teeth from becoming too long, so they gnaw on just about anything. Look for gnaw marks on furniture, electrical wires, insulation and pallets around your home. You may also see droppings around food packages or in drawers and cupboards. If you suspect a rodent problem, contact a local exterminator.
The nests animals build are as diverse as the animals themselves. Some birds create cup shaped nests out of twigs, grasses and leaves that are well concealed and camouflaged against the background, while others like woodpeckers and vireos weave complicated baskets in the forks of trees. Other species, such as hawks and herons, prefer to build simple twig nests in the air. Many factors affect where and how animals build their nests, including climate, location and the availability of different materials.
Rats and mice often burrow underground or into the walls of structures to avoid predators and weather extremes. You can prevent a rat or mouse infestation by sealing entry points into the home and removing potential nesting sites outside the house, such as leaf piles and deep mulch. You should also clean up garbage regularly and store foods in tight-fitting containers. Use natural repellents such as eucalyptus oil, used coffee grounds, peppermint oil or dill seed to keep rodents away from your home.
If you find a bird’s nest in the air, or on the ground, with young ones or eggs, and the mother sitting upon them; thou shalt not take them unto thee, that it may go well with thee, and that thou mayest prolong thy days upon the earth, which the LORD thy God giveth thee.
5. Sounds
Have you been startled awake in the middle of the night by soft thudding sounds coming from your bedroom wall? Did the barely audible scratching sounds you heard at 2:30 AM prevent you from getting a restful night’s sleep? Those sounds were likely caused by rodents scurrying through the walls and attic of your house.
Rodents are notorious for making these noises and they’re not the kind of sounds you want to hear. Not only do these pests cause damage to your home, but they also carry diseases and can increase your energy bills.
The most common indication of a rodent infestation in your home is hearing gnawing or chewing sounds from the walls and ceilings. These sounds are a sign of rodents attempting to build nests or create access routes through the walls. Mouse and rat teeth continuously grow throughout their lives, requiring them to chew on objects like wood and drywall to wear down the sharp ends.
These sounds usually happen during the night, as mice and rats are nocturnal. They can also be heard in the attic, where they’re more likely to build nests.
Often, you will find rodent droppings near these access points or in hidden areas where the rodents are hiding. Mouse droppings are small, resembling black grains of rice, while rat droppings are larger and capsule-shaped. If you notice fresh rodent droppings, call your pest control company immediately.
These signs are indicative of a large rodent problem in your Phoenix home. It’s important to act quickly if you see or hear them, as rodents reproduce at an alarming rate and the infestation can get out of hand fast.