Do seasonal pests cause different types of damage?

Spring is when subterranean termites swarm, giving homeowners their most visible seasonal cue even though the underlying colony has likely been active year-round. It's also when carpenter ants become noticeable in wood that already has a moisture problem, and when carpenter bees begin drilling into exposed fascia and deck lumber. Summer carries that wood-destroying activity forward and adds wasp and yellowjacket nest-building in wall voids and eaves. As temperatures fall toward Manchester's first hard frost — historically around October 19 to 29, per NOAA — mice and rats push indoors, and gnawing complaints on wiring and insulation follow within weeks. Winter concentrates that rodent activity, since the animals are now established indoors for the season.

It's not only which pest is active that changes seasonally — it's the class of damage. Spring and summer's dominant risk is structural: termites and carpenter ants working on wood, slowly. Fall and winter's dominant risk is functional: rodents gnawing wiring, insulation, and plastic supply lines. That's a meaningful distinction for how urgently and how a homeowner should respond in each season, and collapsing all seasonal pest activity into one undifferentiated 'watch out for pests' warning misses exactly the useful, actionable pattern.

Fall also brings the seasonal appearance of cluster flies, boxelder bugs, and ladybugs gathering on sun-warmed exterior walls before slipping indoors to overwinter. This is the pest event most likely to get mislabeled as damage simply because of sheer numbers — but these are nuisance invaders with no property-damage mechanism at all. The honest ranking in this ledger puts them last, not because they're rare, but because 'annoying' and 'damaging' are different categories, and this cluster of pests belongs firmly in the first one.