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By May, Seattle’s cool, wet spring is beginning to give way to warmer, sunnier spells — the exact conditions that bring yellowjackets out of hiding and onto patios across the city. Yellowjackets are social wasps whose annual cycle is synchronized with seasonal change: queens that overwinter underground or in sheltered cavities emerge in spring to…

European paper wasps (Polistes dominula) and the native wasps of the Pacific Northwest (including native Polistes species and several Vespula and Dolichovespula species) can look superficially similar to the casual observer, but they differ in important ways that affect ecology, human encounters, and management. Polistes dominula is an introduced species that has spread widely across…

Bald-faced hornets (Dolichovespula maculata) build large, papery nests and can become aggressively defensive if disturbed, so catching the early warning signs of a nest forming is important for safety and for choosing the right removal approach. A nest does not appear overnight — a single queen starts a small paper structure in spring and a…

When spring finally warms the air, the solitary queen of a social wasp species begins one of nature’s quietly dramatic projects: building a starter nest and rearing the first generation of workers that will go on to run the colony for the season. That seemingly small structure — sometimes a handful of paper cells hung…

Every late spring, many Seattle homeowners notice the delicate, papery umbrellas of wasp nests tucked up under roof eaves and porch overhangs. These structures—built by social paper wasps (genus Polistes)—are not random decorations. They are the result of precise biological timing and a careful choice of microhabitat: solitary overwintering queens emerge as the weather warms,…

In the Pacific Northwest’s mild, damp climate, the first signs of wasp activity often appear in spring as single queens emerge to found new colonies. In Seattle homes those earliest nests are usually modest in size and readily overlooked: a single open comb the size of a golf ball to a small orange, a tiny…

Late spring is prime time for yellowjacket queens to reappear after winter’s dormancy, and May is often when homeowners first notice a single, purposeful wasp inspecting yards and structures. Unlike the noisy swarms of workers that dominate later in the season, a scouting queen acts alone as she searches for a suitable nesting site. Understanding…

Every year as temperatures rise and gardens come back to life, a small but consequential drama begins above our heads: solitary queen wasps emerge from winter hiding and start building nests. What looks like a tiny, fragile paper cup in May can be the seed of a large, aggressive colony by late summer. For homeowners,…

Seattle’s cool, maritime climate — wet winters, mild summers, abundant green space and dense urban landscaping — creates an environment where certain pests thrive year-round. From slugs and snails in shady garden beds to ants, rodents, occasional cockroaches, and mosquito pockets near standing water, homeowners and property managers face recurring challenges. At the same time,…

Ants are one of the most common household pests—ubiquitous, persistent and, at best, an annoyance and at worst a contaminant of food and surfaces. For parents and caregivers, the calculus is different: children’s natural curiosity and tendency to put things in their mouths raises the stakes when choosing pest control. That has driven demand for…