Bald-Faced Hornets in Idaho: How to Identify Their Football Nests and What to Do (2026)

A bald-faced hornet is a big black wasp with an ivory-white face and three white bands near the tip of its abdomen. It runs about three-quarters of an inch long, noticeably bigger than the yellow jackets people mix it up with. White markings on a black body are the tell you can spot from a few feet away.

Here's the part that surprises most Idaho homeowners. The bald-faced hornet isn't a true hornet at all. It's an aerial yellowjacket, Dolichovespula maculata, and Idaho Fish and Game lists it in the state species catalog. We see them across the Treasure Valley from June through the first hard frost.

Up close, the face seals the ID. Yellow jackets have yellow faces and bright yellow-and-black bodies. A bald-faced hornet has that chalk-white face and a body that reads mostly black with white trim.

In our years pulling nests around Boise, Meridian, and Eagle, this is the stinging insect that scares homeowners the most on sight. It looks the part.

A bald-faced hornet nest only gets used once. The colony dies off by winter and next year's queens never reuse it. But an empty-looking nest in early fall can still hold dormant hornets, so don't grab one off a branch assuming it's vacant.

Bald-faced hornets build a gray, football-shaped paper nest that hangs out in the open, usually three feet or more off the ground. That aerial nest is the big difference from yellow jackets, which hide their nests in the ground or inside walls. If you can see a papery gray football hanging from a branch or eave, you're almost certainly looking at bald-faced hornets.

The nest starts small in spring and balloons through summer. A finished one can reach the size of a basketball, sometimes bigger.

Still not sure what you're looking at? Our wasp, bee, and hornet identification guide walks through every stinging insect we see in the Treasure Valley, with nest shapes and field tells for each.

Getting the ID right matters, because the treatment is different for each one. Here's how the three stinging insects Treasure Valley homeowners call us about stack up side by side.

Multiple stings are dangerous even if you're not allergic, and about 1 to 3 percent of adults are allergic to wasp venom. If you take a swarm of stings, get hit near an eye or in the throat, or feel swelling, dizziness, or trouble breathing, get to an ER right away. Don't tough it out.

Yes. Bald-faced hornets will sting, and unlike a honeybee, they can sting again and again without dying. A bee loses its stinger and gives up its life in the process. A bald-faced hornet keeps a smooth stinger and uses it as many times as it wants.

They guard the nest hard. Get within a few feet, bump the branch, or run a mower or pressure washer nearby, and the colony pours out to defend. A single nest can hold hundreds of workers, and they don't come out one at a time.

One more nasty trick. Bald-faced hornets can spray venom from the stinger toward your eyes when they feel cornered, from several feet away. That's why a face full of angry hornets is so dangerous. The sting itself burns hot and swells for a day or two.

This is the part most people miss. A bald-faced hornet colony starts every spring with a single queen who survived the winter. In late May she's building the first layers of the nest by herself. Right now that nest is about the size of a golf ball, and there's one hornet on it.

Give it a few months. By August and September that same nest can be basketball-sized, with 400 to 700 workers defending it. Peak nest visibility in Idaho runs July through September, which is also when the colony is meanest.

The math is simple. One queen knocked down in late May is a colony of hundreds you never have to face in August. This is the easiest and safest treatment window of the whole season.

If you're already seeing a nest take shape on your property, don't wait for it to grow. Green Guard treats bald-faced hornets across the Treasure Valley, and same-day service is available if you book by noon. Call (208) 297-7947 to get on the schedule.

A small, early-season nest the size of a golf ball can sometimes be knocked down at night with a long-range wasp spray, long sleeves, and a clear exit plan. Once it's bigger than a baseball or higher than you can reach from the ground, call a pro. Our wasp and hornet nest removal service has the gear and the formulation to clear it in one trip.

For anything past golf-ball size, don't. A mature bald-faced hornet nest is one of the few pest jobs we tell homeowners to leave alone completely. The whole colony defends at once, they sting repeatedly, and they aim for your face.

Here's why DIY goes sideways fast:

Spot a gray football hanging from your tree or eave? That's our cue. The sooner we get to it, the smaller and calmer the colony.

We knock down every nest we can safely reach, treat it with an organic-based, hospital-grade formulation that's family-safe once dry, and spray a 3-foot barrier around your home so new queens don't set up shop next door. We cover Boise, Meridian, Eagle, Nampa, Caldwell, Kuna, and Star.

The first treatment is just $49. Quarterly plans run $119, $139, or $159 based on home size, and every plan comes with our free re-service guarantee. If they come back between visits, so do we, at no charge.

Call (208) 297-7947 or book online. Same-day service is available if you book by noon. We're locally owned in Boise, 4.9 stars across 170+ Google reviews, with 2,500+ Treasure Valley families on the books.