Michigan is home to a variety of pests that can invade your home throughout the year. Knowing what you’re dealing with is the first step toward effective control. Here’s a guide to identifying the most common pests in the Novi area and understanding the threats they pose.
Ants
Carpenter Ants
Appearance: Large (1/4 to 1/2 inch), black or dark brown, with a single node between thorax and abdomen.
Signs: Sawdust-like shavings (frass) near wood, rustling sounds in walls, winged ants emerging in spring.
Concern: They excavate wood to build nests, causing structural damage. Unlike termites, they don’t eat wood – they just hollow it out.
Pavement Ants
Appearance: Small (1/8 inch), dark brown to black, with parallel lines on head and thorax.
Signs: Small dirt mounds along sidewalks, driveways, and foundations. Trails leading to food sources indoors.
Concern: Primarily a nuisance. They contaminate food and can bite, though bites are rarely felt.
Odorous House Ants
Appearance: Tiny (1/16 to 1/8 inch), brown to black.
Signs: Emit a rotten coconut smell when crushed. Often found trailing along baseboards and countertops.
Concern: Nuisance pest that contaminates food. Difficult to control due to multiple queens per colony.
Rodents
House Mouse
Appearance: Small (2-4 inch body), gray or light brown fur, large ears, pointed nose, long thin tail.
Signs: Small dark droppings (1/4 inch), gnaw marks on food packaging, grease marks along walls, scratching sounds at night.
Concern: Contaminates food with urine and droppings, spreads diseases, can cause fires by chewing electrical wires.
Norway Rat
Appearance: Large (7-9 inch body), brown with gray belly, blunt nose, small ears, shorter tail than body length.
Signs: Large droppings (3/4 inch), burrows in ground, greasy rub marks, gnaw damage.
Concern: Spreads serious diseases, causes significant property damage, aggressive when cornered.
Cockroaches
German Cockroach
Appearance: Small (1/2 to 5/8 inch), tan to light brown with two dark stripes behind the head.
Signs: Pepper-like droppings, egg cases (oothecae), musty odor, seen running when lights are turned on.
Concern: Spreads bacteria and allergens, triggers asthma, breeds rapidly (one female can produce 30,000 offspring per year).
American Cockroach
Appearance: Large (1.5 to 2 inches), reddish-brown with a yellowish figure-8 pattern behind the head. Can fly.
Signs: Seen in basements, crawl spaces, drains. Large droppings with ridges.
Concern: Less common than German cockroaches but still spreads disease and triggers allergies.
Bed Bugs
Appearance: Oval, flat (when unfed), reddish-brown, apple seed size (about 3/16 inch). Becomes swollen and darker after feeding.
Signs: Itchy bites in lines or clusters, blood spots on sheets, dark fecal spots on mattress seams, sweet musty odor.
Concern: While not known to transmit diseases, bites cause itching and sleep deprivation. Psychological distress from infestations is significant.
Termites
Eastern Subterranean Termite
Appearance: Workers are pale, soft-bodied, about 1/8 inch. Swarmers (reproductives) are dark with wings.
Signs: Mud tubes on foundations, hollow-sounding wood, discarded wings near windows in spring, blistering in wood.
Concern: Michigan’s most destructive pest. Cause billions in damage nationwide annually. Hidden damage can be extensive before detection.
Spiders
Common House Spider
Appearance: Yellowish-brown with chevron markings, bulbous abdomen, about 1/4 inch body.
Signs: Tangled cobwebs in corners, window frames, basements.
Concern: Generally beneficial – they eat other insects. Not dangerous but a nuisance in homes.
Wolf Spider
Appearance: Large (1/2 to 1 inch body), dark brown with lighter stripes, hairy, fast-moving.
Signs: Found running on floors, especially in fall when seeking warmth.
Concern: Alarming due to size but not dangerous. Bites are rare and similar to a bee sting.
Stinging Insects
Yellow Jackets
Appearance: Black and yellow striped, about 1/2 inch, smooth body.
Signs: Nests in ground, wall voids, or attics. Aggressive behavior near food, especially in late summer.
Concern: Aggressive when defending nests, can sting repeatedly, dangerous to allergic individuals.
Paper Wasps
Appearance: Brownish with yellow markings, long legs, slender waist, about 3/4 inch.
Signs: Open, umbrella-shaped paper nests under eaves, decks, railings.
Concern: Less aggressive than yellow jackets but will sting to defend nests.
When to Call for Help
While identification is helpful, proper pest control often requires professional expertise. If you’re seeing any of these pests in your Novi home, call (248) 823-6214 for identification and effective treatment options!