WHATCOM COUNTY — If you’ve noticed scratching sounds in the walls, droppings in the garage or chewed food packaging this winter, you’re not alone. Rodent activity typically increases during the colder months across Whatcom County as mice and rats seek warmth, food and shelter indoors.
Winter weather in Northwest Washington creates ideal conditions for rodents to move inside. Heavy rain, colder temperatures and saturated ground force pests out of crawl spaces, fields and wooded areas and into homes and buildings. Once inside, rodents can cause significant damage and pose health risks if left unchecked.
Older homes, which are common in Bellingham, Ferndale, Lynden and rural areas of the county, are especially vulnerable. Small gaps around foundations, utility lines, vents and siding provide easy entry points. A mouse can squeeze through openings as small as a dime, while rats need only slightly larger gaps.
According to pest control professionals at Bio Bug, winter rodent problems often go unnoticed until populations are already established. Rodents reproduce quickly, and a small issue can escalate into a major infestation in a short amount of time.
“In regards to rodents, home owners can save thousands of dollars and loads of grief by being proactive. Often by the time rodents are detected, they have already done significant damage. Eliminating conducive conditions and doing preemptive exclusion can prevent rodent infestations and be very cost effective. Bio Bug will do a free inspection and offer professional advice on eliminating or preventing rodent infestations,” said Steve Cornwell.
Rodents are more than just a nuisance. They can chew through insulation, wiring and wood, increasing the risk of costly repairs and even electrical fires. Contaminated droppings and urine can spread bacteria and allergens, creating potential health concerns for occupants.
Several warning signs may indicate rodents have moved in. Scratching or scurrying noises, especially at night, are common. Homeowners may also notice gnaw marks on baseboards or food containers, nesting materials such as shredded paper, or droppings in kitchens, garages or crawl spaces.
Moisture plays a major role in attracting rodents during winter. Whatcom County’s damp climate creates conditions that pests prefer, particularly in crawl spaces and basements. Standing water, condensation and poor ventilation can make these areas more appealing for nesting.
Homeowners can take steps to reduce the risk of rodent infestations during winter months. Sealing entry points is one of the most effective prevention measures. Gaps around doors, windows and utility penetrations should be sealed with durable materials. Damaged vents and screens should be repaired promptly.
Reducing food sources is also critical. Pet food, bird seed and pantry items should be stored in sealed containers. Crumbs and spills should be cleaned regularly, and garbage should be kept in tightly closed bins.
Maintaining the exterior of the home can also help. Trimming vegetation away from siding, removing debris near foundations and keeping firewood elevated and away from structures reduces hiding places for rodents.
Professional inspections are often recommended, particularly when signs of activity are present. Bio Bug technicians assess homes for entry points, nesting areas and conditions that attract rodents. Addressing the root cause of infestations, rather than relying on temporary solutions, helps prevent recurring problems.
As winter continues, homeowners are encouraged to act quickly if signs of rodents appear. Early intervention can limit damage, reduce health risks and help keep homes pest-free through the remainder of the season and into spring.
