2025 West Michigan Wildlife Guide: Peak Activity by Season
West Michigan’s diverse landscape—ranging from the coastal dunes of Lake Michigan to dense pine forests and inland waterways—supports a rich variety of wildlife. However, when wild animals seek shelter, food, or nesting sites inside residential attics, crawl spaces, and chimneys, they can cause substantial property damage and health hazards.
Understanding the seasonal behavior of local wildlife helps homeowners in Muskegon, Ottawa, and Oceana counties anticipate potential intrusions and take proactive exclusion measures.
Spring: Breeding Season & Attic Invasions
Spring marks the beginning of the birthing season for many nuisance wildlife species in West Michigan. As temperatures warm, female animals search for secure, predator-free locations to raise their young.
Raccoons (March – May)
Female raccoons frequently target attic spaces, chimneys, and soffits. They can tear through roof shingles, bend aluminum vents, and destroy insulation to build maternal dens.
- Key Signs: Thumping or crying sounds in the ceiling, torn roof vents, tracks on downspouts.
- Action: Humane removal requires ensuring baby kits are safely retrieved alongside the mother before sealing entry points.
Skunks (March – April)
Skunks emerge from winter torpor to mate and excavate dens beneath porches, decks, concrete slabs, and sheds.
- Key Signs: Musky odors near foundation vents, 3–4 inch circular burrows along exterior walls.
Summer: Foraging, Roosting & Yard Disturbances
During summer, wildlife activity peaks outdoors as animals forage aggressively for insects, grubs, and fruits.
Bats (June – August)
Michigan is home to big brown bats and little brown bats, both of which are protected species during their maternity season (typically late spring through mid-summer). Bats roost in warm attic peaks and ridge vents.
- Key Signs: Squeaking noises at dusk, dark staining around roof gaps, guano accumulations in attics.
- Exclusion: Professional bat exclusion utilizes one-way exit doors after the maternity season has concluded, allowing bats to exit safely without re-entry.
Moles & Groundhogs / Woodchucks
Warm summer soil brings earthworms and grubs to the surface, causing extensive mole tunneling across West Michigan lawns. Woodchucks dig extensive underground burrow networks that undermine foundations, retaining walls, and deck footings.
Fall: Winter Preparation & Rodent Exclusion
As autumn temperatures drop, wildlife shifts focus to caching food and securing warm winter harborage.
Squirrels (September – November)
Grey squirrels, red squirrels, and flying squirrels look for warm attics to stash acorns and build winter dreys. Their persistent gnawing on electrical wiring, structural wood, and PVC plumbing poses severe fire and water damage risks.
Mice & Rats (October – December)
Rodents can enter structures through openings as small as a dime. Sealing gaps around foundation pipes, garage door weatherstripping, and crawl space vents is critical before snowfall.
Winter: Overwintering Pests & Emergency Exclusion
Wildlife remains active even during cold Michigan winters:
- Opossums: Often seek warmth in insulated crawl spaces and attached garages.
- Raccoons & Squirrels: Remain active in heated attic voids throughout winter months.
- Emergency Service: Heavy snow and freezing temperatures make professional inspection and humane trapping essential for prompt property protection.
Professional Wildlife Exclusion
Preventing animal intrusions is far more cost-effective than remediating damage after an infestation has taken hold. A comprehensive wildlife inspection identifies subtle construction gaps, compromised roof flashing, and vulnerable vents before animals gain access.
If you suspect nuisance wildlife activity in your home or business, contact Advanced Wildlife Control for safe, humane removal and permanent exclusion solutions across Muskegon and West Michigan.