The gray football in the tree, and whether it is your problem
Bald-faced hornet nests generate more panic than any other wasp situation in Omaha, and most of that panic is misplaced. The nest starts in May as something the size of a golf ball and reaches basketball size or larger by September. It is enclosed in gray paper with a single opening near the bottom, and the colony inside is genuinely defensive within a few feet of it. That radius is the entire question. A nest fifteen feet up in a maple at the back of the lot bothers nobody, and it has a hard deadline: the colony dies with the frost and the paper is never reoccupied. Doing nothing is a legitimate plan. A nest at head height in a lilac beside the front walk is different, because people brush past it without seeing it. So is one over a deck, a driveway, or a swing set. When a nest does need treating, the enclosed shape is why a can from the hardware store rarely works. Most of the colony sits inside the paper, sheltered from anything sprayed at the outside.
How the wasp year runs in a cold-winter city
Everything on this page comes back to a calendar that resets completely each year. Late April and May: overwintered queens come out of bark, woodpiles, and sheds and start building alone. A nest is a few open cells. One person, one broom, no gear. June and July: the first workers take over foraging and hunting, the queen moves inside to lay full time, and the nest expands without attracting much notice. Open combs are still an easy target on a cool night. August and September: peak in Omaha. The colony reaches its largest worker force, responds fastest to disturbance, and switches from hunting insects to seeking sugar. Ground nests get discovered now because there are finally enough wasps to see. October: production shifts to next year's queens and males, the colony stops defending as vigorously, and numbers fall. First hard frosts: over. Workers and the old queen die, the mated queens disperse to shelter, and the nest becomes an empty artifact.
The nests you never see until something goes wrong
Serious sting incidents almost never involve the nest people were watching. They involve one nobody knew about. A yellowjacket colony underground shows almost nothing at the surface: a small opening at the base of a shrub, along a slope, at the lip of a bed, or in a burrow some animal abandoned. All of the growth happens below. What triggers a mass response is disturbance transmitted through the soil or the structure. Equipment running nearby, a shovel, a foot on soft ground, a ladder set against siding above a wall colony. Yellowjackets react collectively and follow, and they leave a chemical mark that draws more of them to the same target. The CDC's tally of United States sting deaths from 2011 through 2021 came to 788, and 84 percent of the people who died were male. That number reflects who is running mowers, trimmers, and roofing crews. Two minutes of standing still and watching a strange patch of yard before you start work is the whole preventive measure.
What a proper first visit looks like
You learn most about a wasp company in the first ten minutes, before anything is applied. Expect a walk around the whole property rather than a beeline to the nest you called about. Two or three colonies on one lot is normal in Omaha, especially where there is a detached garage, a shed, a wood fence, and mature trees. Expect questions about which doors get daily use, where children and pets spend time, and whether anyone in the house has a sting allergy, since those answers decide what gets handled first. For a concealed colony, most of the visit should be observation. Standing back and reading flight lines finds the true opening, which is often several feet from the gap you assumed. Expect evening or after-dark treatment for ground and wall nests, or a scheduled return to do it then. Before anyone leaves, you should know which nest was treated, roughly what was used, when activity should stop, and who is responsible for closing the opening afterward.
Making sense of two very different quotes
When two companies price the same nest differently, scope is usually the reason rather than one of them padding the number. Ask each of them, in the same words, whether the price covers killing the colony only, or also taking down the nest, or also closing the opening the wasps used. Those are three separate jobs. A low quote that stops at the first one is not wrong, it is just smaller, and the gap shows up next spring when another queen finds the same soffit. Ask what happens if activity continues past a week. Nests deep in a wall sometimes take a second application, and you want that answer before you pick, not after. Ask when they intend to treat. A company willing to schedule a ground nest at dusk is doing better work than one that will only come at eleven in the morning, since the foragers out during the day are exactly the wasps that come home to a treated entrance. And ask what happens to the hole. An untreated opening is the reason the nest was there in the first place.
Prevention that fits a detached house with a yard
Most wasp problems on an Omaha lot trace back to a handful of openings, and closing them in early spring beats anything you can spray in September. Begin at the roofline. The joint where soffit meets siding, loose fascia, and torn gable vent screens are the standard doorways into a wall or attic. Fix them in March and April while nobody is living behind them. Move on to the outbuildings. Detached garages, sheds, and playhouses collect nests precisely because nobody looks at their eaves from one year to the next. Add them to the spring walk. Then the fence and deck. Weathered wood is both shelter and raw material, since paper wasps rasp fiber off unpainted boards to build with. Sealing or painting exposed surfaces removes part of that supply and makes new combs easier to spot. Finally, the ground. Old rodent burrows against a foundation are prime yellowjacket sites. Fill them while they are empty, never once there is traffic.