Know What’s Crawling, Flying or Hiding Nearby
Pests are part of life on Vancouver Island, but they become a problem when they move into homes and businesses, damage structures, contaminate living areas, or create health and safety concerns.
Pacific Coastal Pest Control helps property owners across Campbell River, Courtenay, the Comox Valley, Black Creek, Port Hardy, and communities throughout North Vancouver Island identify and manage common structural pests.
Use this guide to identify common pests, understand when they are most active, recognize warning signs, and learn when professional pest control may be the right next step.
Find the Pest You’re Looking For
RODENTS
Rat
Rats are intelligent, cautious rodents that often live close to people because homes, businesses, compost, garbage, sheds, decks, crawl spaces, and landscaping can provide food, water, shelter, and travel routes.
On Vancouver Island, rats are commonly noticed around houses, garages, sheds, vehicles, crawl spaces, attics, fence lines, and outdoor storage areas.
When Do Rats Usually Become a Problem?
Rat activity can happen year-round, but fall is an important prevention season. As temperatures cool and natural food sources decline, rats are more likely to seek warmth, shelter, and reliable food around properties.
Late summer and early fall are ideal times to inspect for vulnerabilities and get rodent maintenance in order before colder weather arrives.
Common Signs of Rats
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Scratching, chewing, or scurrying sounds in walls, ceilings, attics, crawl spaces, or under floors
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Dark droppings in garages, cupboards, sheds, crawl spaces, attics, or near appliances
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Chewed insulation, wiring, plastic, wood, stored items, or food packaging
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Greasy rub marks along walls, pipes, baseboards, beams, or repeated travel routes
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Burrows or holes near foundations, decks, sheds, fence lines, woodpiles, or landscaping
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Activity around compost, garbage, bird seed, pet food, fruit trees, or outdoor storage
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Droppings or nesting material inside vehicle engine compartments
Rat Prevention Tips
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Seal gaps around foundations, vents, pipes, siding, garage doors, and utility penetrations
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Keep garbage, compost, pet food, bird seed, and stored food sealed
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Trim vegetation and reduce clutter around exterior walls
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Store firewood and building materials away from structures
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Inspect crawl spaces, sheds, decks, and fence lines before fall and winter
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Address signs of activity before rodents become established
Why Do Rats Matter?
Rats can contaminate surfaces, damage insulation, chew wiring, and create odours. Because much of their activity can remain hidden, treating only what is visible may not resolve the problem. Understanding where rats are nesting, travelling, feeding, and gaining access is an important part of effective control.
Call if you hear scratching, find droppings, notice chewed materials, see rats around the property, or suspect they have entered an attic, crawl space, garage, shed, or building.
RODENTS
Mice
Mice are small rodents capable of squeezing through very small gaps and quickly moving into warm, protected spaces. They are often found in kitchens, garages, storage rooms, crawl spaces, attics, wall voids, sheds, and businesses where food or nesting material is available.
When Do Mice Usually Become a Problem?
Mice can remain active indoors throughout the year. They are often noticed more during fall and winter as they seek shelter, but indoor populations can continue breeding when food, warmth, and suitable nesting areas are available.
Common Signs of Mice
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Small, dark droppings in cupboards, drawers, pantries, garages, crawl spaces, or behind appliances
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Chewed food packaging, cardboard, insulation, paper, or stored fabrics
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Scratching or light movement sounds in walls or ceilings
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Nests made from shredded paper, insulation, fabric, or other soft materials
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Musty odours in enclosed spaces
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Pets showing unusual interest in cupboards, appliances, or wall areas
Mouse Prevention Tips
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Store food, pet food, and bird seed in sealed containers
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Clean crumbs, spills, and grease from kitchens and storage areas
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Seal gaps around pipes, siding, vents, doors, and foundations
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Reduce clutter in garages, crawl spaces, and storage areas
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Check weather stripping and door sweeps
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Avoid leaving pet food out overnight
Why Do Mice Matter?
Mice can contaminate food and surfaces, damage stored belongings, and reproduce quickly. Their small size also means there may be more potential entry points around a building than initially expected.
Professional help may be appropriate if you find droppings, hear movement, notice damage, or continue seeing activity after basic cleanup and trapping.
ANTS & WOOD-DAMAGING INSECTS
Carpenter Ants
Carpenter ants are large ants that tunnel into wood to create nesting galleries. Unlike termites, they do not eat the wood, but growing colonies can still cause damage. They are often associated with damp, decaying, or moisture-damaged wood and may be found in walls, ceilings, attics, crawl spaces, window areas, decks, fence posts, and other structural areas.
When Do Carpenter Ants Usually Become a Problem?
Carpenter ants become more visible in spring as temperatures rise and colonies become active. Activity can continue throughout summer. Winged ants indoors, particularly during spring, may indicate a colony inside or near the structure.
Common Signs of Carpenter Ants
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Large black or dark ants appearing repeatedly indoors
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Sawdust-like material called frass near windows, baseboards, beams, crawl spaces, or damaged wood
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Rustling sounds inside walls in heavier infestations
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Ants entering around windows, siding, rooflines, decks, or damp wood
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Winged ants indoors or near windows
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Moisture-damaged or soft wood near ant activity
Carpenter Ant Prevention Tips
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Repair leaks and moisture problems promptly
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Replace rotten or moisture-damaged wood
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Keep firewood away from the house and off the ground
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Trim branches and vegetation away from structures
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Seal exterior gaps and cracks
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Watch for frass and recurring ant activity during spring
Why Do Carpenter Ants Matter?
Carpenter ants may point to a hidden moisture or structural concern. Visible ants do not always reveal where the main colony is located, making proper identification and nest tracing important.
Call if you repeatedly see large ants indoors, find frass, notice activity around damp wood, or suspect ants inside walls, attics, crawl spaces, decks, fences, or window areas.
ANTS & WOOD-DAMAGING INSECTS
Pavement Ants
Pavement ants are small ants commonly associated with cracks in pavement, patios, concrete, driveways, walkways, foundations, and soil beside buildings. They may enter homes and businesses while searching for food.
When Are They Most Active?
Activity is usually more noticeable in spring and summer. Indoor activity may continue when ants have reliable access to food or moisture.
Common Signs
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Ant trails along floors, baseboards, countertops, patios, or foundations
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Small soil piles around cracks in pavement or concrete
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Activity around sinks, garbage, recycling, pet food, or pantry items
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Ants returning after surface treatments
Prevention Tips
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Keep counters, floors, pet feeding areas, and garbage areas clean
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Store sugary and greasy foods in sealed containers
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Rinse recycling and empty garbage regularly
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Seal cracks and gaps
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Reduce moisture near foundations and patios
Why Do They Matter?
Pavement ants are generally a nuisance rather than a structural threat, but colonies can be persistent. Treating only the visible ants may leave the colony active.
Call if ant trails keep returning, indoor activity persists, or you are unsure which ant species is present.
ANTS & WOOD-DAMAGING INSECTS
Cornfield Ants
Cornfield ants are generally associated with soil, lawns, garden areas, foundations, and outdoor nesting sites. They may become a nuisance when they move toward buildings in search of food or moisture.
When Are They Most Active?
Activity is usually highest during spring and summer, particularly around landscaped areas, garden beds, damp soil, and foundation edges.
Common Signs
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Small ants around foundations, gardens, soil, patios, or lawn edges
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Trails leading toward doors, windows, or foundation gaps
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Indoor activity near food, moisture, or ground-level entry points
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Recurring ants despite cleaning and basic treatment
Prevention Tips
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Reduce access to food indoors and outdoors
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Keep vegetation and soil buildup away from siding
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Seal gaps around doors, windows, pipes, and foundations
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Address moisture and drainage issues
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Monitor activity before it spreads indoors
Professional identification can help if ant trails keep returning or if you are unsure whether the insects could be carpenter ants.
ANTS & WOOD-DAMAGING INSECTS
Dampwood Termites
Dampwood termites are wood-damaging insects associated with moist, decaying, or water-damaged wood. Unlike carpenter ants, termites consume wood. Around Vancouver Island, dampwood termites are more commonly associated with moisture problems than with dry, sound structural wood.
When Do They Usually Become a Problem?
Termite activity may remain unnoticed for long periods. Winged reproductive termites can appear during swarming periods, often during warm and humid conditions. Moisture problems can increase vulnerability throughout the year.
Common Signs
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Soft, damp, decaying, or hollow-sounding wood
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Damage around decks, fence posts, crawl spaces, window frames, or sill plates
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Winged insects or shed wings near windows, lights, or damp wood
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Pellet-like material or debris
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Leaks, drainage problems, or wood-to-soil contact near activity
Prevention Tips
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Repair leaks and drainage problems
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Replace or remove decaying wood
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Avoid wood-to-soil contact where possible
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Keep crawl spaces ventilated and dry
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Move firewood and wood debris away from structures
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Inspect moisture-prone wood regularly
Why Do They Matter?
Dampwood termites can signal that both the pest activity and the underlying moisture conditions require attention.
Call if you notice suspicious wood damage, winged insects, shed wings, or moisture-damaged wood.
STINGING INSECTS
Wasps
Wasps are seasonal stinging insects that may build nests around homes, yards, sheds, rooflines, decks, attics, crawl spaces, trees, wall voids, and ground openings. They become a concern when nests are close to people, pets, entrances, patios, work areas, or children's play areas.
When Are Wasps Most Active?
Activity begins in spring as queens establish nests. Colonies grow throughout summer and often become more noticeable in late summer and early fall.
Common Signs
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Repeated wasp traffic entering and leaving one area
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Visible paper nests under eaves, decks, branches, sheds, or rooflines
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Wasps disappearing into wall gaps, soffits, cracks, retaining walls, or ground holes
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Increased activity around garbage, compost, fallen fruit, barbecues, or outdoor eating areas
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Defensive behaviour near doors, decks, patios, or walkways
Prevention Tips
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Inspect eaves, sheds, decks, and rooflines early in the season
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Keep garbage, compost, and outdoor food sealed
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Clean up fallen fruit and sugary spills
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Avoid disturbing an active nest
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Never seal an active nest inside a structure without an appropriate plan
Professional help is recommended when a nest is close to people, pets, entrances, play areas, or business activity, or when wasps are entering a wall, attic, crawl space, or ground opening.
STINGING INSECTS
Hornets
Hornets are large stinging insects closely related to wasps. They may build paper nests in trees, shrubs, under eaves, on buildings, or in other protected outdoor areas.
When Are They Most Active?
Nests typically develop in spring and expand throughout summer, with activity often peaking in late summer and early fall.
Common Signs
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Large wasp-like insects repeatedly travelling to one location
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A visible grey or paper-like nest
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Stinging insects around entrances, decks, patios, or work areas
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Increased defensive behaviour near a nest
Call if hornets are nesting near people, pets, public spaces, or work areas.
STINGING INSECTS
Yellowjackets
Yellowjackets are aggressive wasps with distinctive yellow-and-black markings. They often nest underground, inside wall voids, under steps, in retaining walls, or around landscaping.
When Are They Most Active?
Activity increases throughout summer and is often most noticeable in late summer and early fall.
Common Signs
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Yellow-and-black wasps around food, garbage, or outdoor eating areas
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Repeated traffic into a ground hole, wall gap, or hidden void
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Aggressive insects near lawns, pathways, decks, or play areas
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Sudden swarming or stinging after a nest area is disturbed
Prevention Tips
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Keep garbage and compost sealed
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Clean up food waste, sugary drinks, and fallen fruit
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Watch for hidden nests around high-traffic areas
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Use caution when mowing or landscaping near insect activity
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Avoid attempting to treat underground nests without appropriate knowledge and protection
Why Do They Matter?
Underground and concealed nests can be difficult to spot until someone gets too close. Yellowjackets can be particularly concerning around homes, schools, businesses, restaurants, patios, and public areas.
STINGING INSECTS
Bees
Bees are important pollinators and should not automatically be treated in the same way as nuisance wasps. Honey bees, bumble bees, and other pollinators may be found around flowers, gardens, trees, siding, rooflines, or wall voids.
Proper identification comes first.
Common Signs
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Clusters of bees on a branch, fence, wall, or structure
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Bees repeatedly entering one opening in siding or soffits
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Heavy activity around flowers, shrubs, clover, or fruit trees
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Buzzing from inside a wall or structure
Why Do They Matter?
A temporary swarm and an established colony inside a building are different situations. The appropriate response depends on the species, location, and risk to people.
Call if bees are entering a structure, nesting near a high-traffic area, or if you cannot determine whether the insects are bees, wasps, hornets, or yellowjackets. When appropriate, relocation or referral may be preferable to extermination.
HOUSEHOLD INSECTS
Bed Bugs
Bed bugs are small, flat, wingless insects that feed on blood, usually at night. They hide close to places where people sleep or rest, including mattress seams, bed frames, headboards, couches, furniture, baseboards, cracks, and wall gaps.
Bed bugs are not a sign that a home is dirty. They can be introduced through travel, luggage, used furniture, visitors, shared laundry, or multi-unit housing.
When Do They Usually Become a Problem?
Bed bugs can remain active indoors year-round.
Common Signs
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Red or itchy bites noticed after sleeping
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Small dark or rusty spots on bedding or furniture
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Shed skins, tiny eggs, or live insects
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Blood spots on bedding
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Musty odours in heavier infestations
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Activity around beds, couches, headboards, baseboards, or luggage
Prevention Tips
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Inspect used furniture before bringing it inside
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Check beds, headboards, and luggage areas while travelling
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Keep luggage off beds and upholstered furniture where possible
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Reduce clutter around sleeping areas
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Wash and dry suspect fabrics using appropriate heat settings where possible
Call as soon as bed bugs are suspected. Early identification is important because they hide extremely well and can become more difficult to manage as they spread.
HOUSEHOLD INSECTS
Silverfish
Silverfish are small, fast-moving, wingless insects with tapered bodies and a silvery-grey appearance. They prefer dark, damp, humid spaces and are commonly found in bathrooms, basements, laundry rooms, crawl spaces, kitchens, and storage areas.
Common Signs
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Small silver or grey insects moving quickly when lights turn on
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Activity in humid rooms
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Damage to paper, cardboard, books, wallpaper, or stored materials
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Shed skins or tiny pepper-like droppings
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Recurring activity in poorly ventilated spaces
Prevention Tips
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Reduce humidity through ventilation or dehumidification
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Repair leaking pipes and faucets
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Clean under sinks and behind appliances
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Vacuum regularly
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Store paper, cardboard, books, and fabrics in dry areas
Call if activity is persistent, spreading, or connected to damp areas that are difficult to inspect.
HOUSEHOLD INSECTS
Cockroaches
Cockroaches are resilient insects that can become a serious concern in homes, apartments, restaurants, commercial kitchens, care facilities, and other food-handling environments.
They are attracted to food, warmth, moisture, grease, garbage, cardboard, drains, and protected cracks or voids.
Common Signs
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Live cockroaches, particularly at night
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Small dark droppings resembling pepper or coffee grounds
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Egg cases in hidden areas
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Musty or oily odours
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Activity near sinks, dishwashers, drains, kitchens, appliances, or storage areas
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Smear marks in damp areas or along travel routes
Prevention Tips
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Clean grease, crumbs, spills, and food debris
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Store food in sealed containers
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Empty garbage regularly
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Reduce cardboard storage and clutter
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Repair leaks and reduce moisture
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Seal cracks and gaps
Professional control is strongly recommended when cockroach activity is found, particularly in kitchens, restaurants, apartments, rental properties, or businesses.
HOUSEHOLD INSECTS
Fleas
Fleas are small, jumping insects that feed on blood and are often associated with pets, wildlife, animal bedding, crawl spaces, carpets, furniture, and areas where animals rest. Homes without pets can also experience flea activity if wildlife has nested nearby or fleas are introduced from another location.
Common Signs
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Pets scratching or grooming excessively
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Small jumping insects on pets, carpets, furniture, or bedding
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Bites around ankles or lower legs
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Small dark specks in pet bedding or fur
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Activity where pets or wildlife have rested
Prevention Tips
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Speak with a veterinarian about appropriate flea prevention for pets
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Wash pet bedding regularly
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Vacuum carpets, rugs, furniture, and pet resting areas
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Reduce wildlife access to crawl spaces, decks, and sheds
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Address activity early
Call if flea activity continues after pet treatment, people are being bitten indoors, or the source of the infestation is unclear.
A Seasonal Guide to Vancouver Island Pests
Spring
Ants, carpenter ants, early wasp activity, silverfish, and other insects often become more active as temperatures rise. Spring is a good time to inspect the exterior, identify entry points, correct moisture problems, and consider preventative treatment where there is a history of pest activity.
Fall
Rodent prevention becomes particularly important as rats and mice search for warmth, shelter, and reliable food. Foundations, crawl spaces, garage doors, vents, sheds, decks, and fence lines are worth checking before colder weather arrives.
Summer
Wasps, hornets, yellowjackets, ants, fleas, and many household insects become more active. Outdoor food, compost, garbage, fruit trees, moisture, and warm weather can all increase pest pressure.
Winter
Outdoor insect activity may decrease, but rodents and established indoor pests can remain active. Scratching sounds, droppings, odours, bed bug signs, cockroach activity, and damp-area insects should not be ignored simply because it is winter.
Simple Steps to Make Your Property Less Inviting to Pests
Many pest problems begin outside before moving indoors. Long-term prevention often combines inspection, sanitation, maintenance, exclusion, and targeted treatment when needed.
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Seal gaps around foundations, vents, pipes, siding, garage doors, soffits, and utility penetrations
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Keep food, pet food, bird seed, compost, garbage, and recycling properly sealed
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Clean crumbs, grease, spills, and food debris regularly
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Trim vegetation away from buildings
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Store firewood, lumber, and clutter away from structures
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Repair moisture problems, leaks, rotten wood, and drainage issues
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Inspect crawl spaces, attics, sheds, decks, fence lines, and exterior walls seasonally
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Act early when you notice droppings, frass, scratching sounds, recurring insects, or signs of damage
Want to stay ahead of seasonal pest activity? Explore our Preventative Pest Maintenance services.
