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Just as the first warm days of spring coax buds from branches, they also stir insect life that’s been quiet all winter — and nowhere does that sudden activity feel more invasive than when you find a line of ants marching across your bathroom sink. Seeing these tiny intruders in a place you associate with…

Pavement ants—commonly the small, brown Tetramorium species often seen marching in thin lines across sidewalks—are especially well adapted to urban environments, and Seattle’s mix of wet winters, mild temperatures, and extensive paved surfaces makes driveways a particularly attractive landscape for them. Understanding how these ants choose nesting spots along driveways requires looking beyond the visible…

Odorous house ants (Tapinoma sessile) are one of the most common indoor invaders, and their movement patterns are usually the first clue that you have an infestation. Unlike some ants that forage in small scattered groups, odorous house ants typically form distinct, organized trails of individuals moving in single file between a food source and…

Ants are one of the most common indoor pests, turning up in kitchens, bathrooms and pantries where food and moisture are available. When homeowners spot a line of worker ants marching across a counter, the instinct is to act quickly — but the choice of treatment matters. Two widely used options are ant baits and…

It’s a frustrating, familiar scenario: you set out ant bait early in the season, the trails taper off and the piles of sugar vanish as if your bait is working—then midway through the season the ants are back, bold and numerous, and the bait sits untouched. Understanding why ant bait “stops working” halfway through the…

When you spot a trail of ants across the kitchen counter in May, it’s natural to want a fast, definitive fix. Ant baits are one of the most commonly recommended solutions because they exploit ants’ social behavior: foragers take poisoned bait back to the nest, share it through trophallaxis, and (ideally) the active ingredient is…

As Seattle moves out of the chill of winter into the milder, wetter days of late spring, many homeowners notice a small but persistent problem: trails of tiny ants marching across countertops and vanishing into cracks around the sink. “Sugar ants” is a catch‑all term people use for ants attracted to sweets and carbohydrates, and…

May is prime swarming season for many flying insects that infest homes, and two of the most commonly confused are carpenter ant swarmers and termite swarmers. Both are winged reproductive individuals that leave their colonies to mate and establish new nests, and spotting a swarm—or piles of discarded wings—around your windows or light fixtures can…

Every spring, many homeowners and naturalists across the Pacific Northwest notice a sudden, dramatic event: clouds of winged ants rising from cracks, stumps and tree cavities and drifting toward streetlights and porch bulbs. These swarms are not random infestations but the species’ carefully timed reproductive flights — nuptial flights — when mature carpenter ant colonies…

In Seattle’s temperate, often-wet climate, wasps are a familiar part of the urban ecosystem — and homeowners frequently notice their nests on porches, eaves, in attics, and among the trees that line many neighborhoods. But wasp nest placement is not random. Species such as paper wasps, yellowjackets and bald-faced hornets each have distinct preferences driven…