Comprehensive database of common Pennsylvania pests with expert identification tips, life cycle information, treatment methods, and safety guidelines.
Reticulitermes flavipes
Habitat: Underground colonies connected to wood via mud tubes; requires soil contact and moisture
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Camponotus spp.
Habitat: Nests in moist, decaying wood; hollow trees, logs, stumps, wooden structures
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Cimex lectularius
Habitat: Mattress seams, box springs, bed frames, cracks in furniture, behind baseboards, electrical outlets
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Tapinoma sessile
Habitat: Nests in wall voids, under floors, in mulch, under rocks; prefer moisture
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Monomorium pharaonis
Habitat: Warm buildings year-round; nests in wall voids, behind baseboards, in insulation
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Musca domestica
Habitat: Breeding sites: garbage, animal waste, compost, decaying vegetation; adults rest on ceilings, walls
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Myotis lucifugus
Habitat: Roosts in attics, barns, behind shutters, in tree cavities; colonies 100s-1000s; hibernate in caves/mines
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Peromyscus leucopus
Habitat: Outdoor species but enters buildings in fall; nests in wall voids, attics; prefers wooded areas, fields
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Mephitis mephitis
Habitat: Dens under decks, sheds, porches, in crawlspaces; prefer edges of woods, fields; near suburban areas
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Xylocopa virginica
Habitat: Bore 1/2 inch round holes in unpainted wood; prefer eaves, decks, siding, fences
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Aedes albopictus
Habitat: Breeds in small containers: flower pots, bird baths, tires, clogged gutters, tarps, toys
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Eptesicus fuscus
Habitat: Buildings, attics, barns, behind shutters; hibernate in buildings more than little browns; solitary or small colonies
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Peromyscus maniculatus
Habitat: Primarily outdoor; nests in tree cavities, stumps, abandoned structures; enters homes in fall/winter; prefer rural areas
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Procyon lotor
Habitat: Dens in attics, chimneys, under decks, in trees; near water; urban/suburban adaptable
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Sciurus carolinensis
Habitat: Trees, attics, soffits, wall voids; nest (dreys) in trees; prefer hardwood forests but adapt to suburbs
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Crematogaster spp.
Habitat: Nests in moist or damaged wood, foam insulation, soil; often where carpenter ants or termites have been
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Vespula spp.
Habitat: Underground nests, wall voids, attics, hollow trees; paper-like nests
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Dolichovespula maculata
Habitat: Aerial nests in trees, shrubs, building eaves; large gray paper nests
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Tetramorium caespitum
Habitat: Nests under pavement cracks, stones, along curbs, foundations
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Latrodectus mactans
Habitat: Dark, undisturbed areas: woodpiles, sheds, garages, crawlspaces, meter boxes
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Periplaneta americana
Habitat: Sewers, basements, steam tunnels, boiler rooms, drains; prefer warm, moist areas
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Halyomorpha halys
Habitat: Outdoors on trees, shrubs, gardens; overwinter indoors in attics, wall voids
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Ixodes scapularis
Habitat: Wooded areas, tall grass, leaf litter, shrubs; questing on vegetation
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Loxosceles reclusa
Habitat: Dark, undisturbed areas: closets, attics, basements, behind furniture, in stored boxes
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Blatta orientalis
Habitat: Cool, damp areas: basements, crawlspaces, drains, under porches, mulch beds
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Mus musculus
Habitat: Nests in wall voids, cabinets, storage areas, insulation
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Blattella germanica
Habitat: Kitchens, bathrooms, warm areas near food/water; hide in cracks, cabinets, appliances
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Rattus norvegicus
Habitat: Burrows outdoors near foundations, under debris; indoors in basements, sewers, ground-level areas
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Ctenocephalides felis
Habitat: On pets (cats, dogs); larvae in carpets, pet bedding, upholstery; prefer warm, humid areas
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Lepisma saccharina
Habitat: Bathrooms, basements, kitchens; prefer high humidity (75-95%), dark areas, temperatures 70-80°F
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Scutigera coleoptrata
Habitat: Damp areas: basements, bathrooms, crawlspaces; behind baseboards, in drains; outdoors under rocks
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Lycosidae (various species)
Habitat: Ground-dwelling; outdoors in grass, gardens, leaf litter; enter homes at ground level; hunt at night
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Boisea trivittata
Habitat: Outdoors on boxelder and maple trees; sun-facing walls in fall; overwinter in wall voids, attics
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Bryobia praetiosa
Habitat: Outdoors on lawns, especially thick, well-fertilized grass; sunny south/west-facing walls; enter buildings through cracks
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Pholcus phalangioides
Habitat: Basements, cellars, garages, crawlspaces, corners, under furniture; prefer cool, damp areas
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Plodia interpunctella
Habitat: Pantries, cupboards, food storage areas; infest grains, cereals, nuts, dried fruits, pet food, bird seed
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Pollenia rudis
Habitat: Outdoors in summer; overwinter in attics, wall voids, false ceilings in large clusters; emerge indoors on sunny winter days
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Collembola (various species)
Habitat: Moist areas with decaying organic matter: mulch, soil, leaf litter, damp basements, around leaks, in potted plants
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Forficula auricularia
Habitat: Outdoors under mulch, rocks, boards; indoors in basements, bathrooms; need moisture
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Diplopoda (various species)
Habitat: Outdoors in mulch, leaf litter, under stones, in compost; migrate indoors in fall and during heavy rain
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Acheta domesticus
Habitat: Outdoors in fields, lawns; indoors in basements, kitchens, behind appliances; need warmth and moisture
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Parasteatoda tepidariorum
Habitat: Upper corners of rooms, windows, eaves, garages, basements; builds cobwebs
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