White-faced hornets, more commonly called bald-faced hornets, build large, gray, football-shaped paper nests that can reach up to 24 inches tall and 18 inches across. Despite the name, these insects are technically a type of yellowjacket, not a true hornet. If you’ve spotted a big papery structure hanging in a tree or bush, you’re likely looking at one of these nests, and understanding what’s inside and how the colony behaves will help you figure out your next steps.
What the Nest Looks Like
A bald-faced hornet nest is a gray, oval or teardrop-shaped ball made entirely of paper. The hornets manufacture this paper themselves by chewing weathered or rotting wood, mixing it with saliva, and forming a paste they layer into thin, papery sheets. Inside, the nest contains tiers of hexagonal comb cells where larvae develop, all wrapped in multiple layers of that outer paper shell for insulation and protection.
Nests hang from branches, bushes, or the eaves of buildings, typically at least 3 feet off the ground and sometimes as high as 60 feet up in a tree. Early in the season, a nest may be only the size of a golf ball. By late summer it can grow to the size of a basketball or larger. The gray coloring and papery texture are distinctive: if the nest looks smooth and grayish-white rather than waxy or muddy, it almost certainly belongs to bald-faced hornets.
How a Nest Develops Through the Year
Every nest starts from scratch each spring. A single mated queen, the only member of the colony to survive winter, emerges from a sheltered hiding spot and begins building alone. She constructs the first small cluster of brood cells, lays eggs, and feeds the initial batch of larvae entirely by herself. Once those first workers emerge as adults, they take over foraging, construction, and defense while the queen focuses solely on laying eggs.
The colony grows steadily through summer, with the nest expanding to accommodate hundreds of workers. Activity peaks in late summer and early fall when the population is at its largest. In autumn, the colony produces a final brood of new queens and males, which leave the nest to mate. After that, social order inside the nest breaks down. Workers may toss out remaining larvae or build odd formations on the nest exterior. The first hard frost kills all the males and workers, leaving only the newly mated queens to hibernate through winter and start the cycle again.
Old Nests Are Never Reused
A common question is whether hornets will return to a nest the following year. They won’t. Each spring’s queen builds a completely new nest in a new location. The old structure, now empty, gradually deteriorates through winter weather. If you find a gray paper nest in a bare tree during December, it’s abandoned and safe to remove or simply leave alone. It will eventually fall apart on its own.
How Close Is Too Close
Bald-faced hornets are notably aggressive when defending their nest. They will typically attack anyone who comes within about 3 feet of the colony. Vibrations from mowing, trimming hedges, or walking heavily near a low-hanging nest can trigger a defensive response. When disturbed, these hornets don’t send one or two scouts. They swarm in large numbers.
Their stings are particularly painful, and unlike honeybees, bald-faced hornets have smooth stingers that don’t detach. A single hornet can sting you multiple times in rapid succession. When an entire group attacks, the cumulative venom can cause significant swelling. For most people, the result is intense pain and localized swelling that fades within a few days. For those with venom allergies, multiple stings can trigger a life-threatening allergic reaction.
Why the Nest Might Be Worth Keeping
Bald-faced hornets are effective predators of other insects, including flies, caterpillars, and even other yellowjackets. A colony working through the summer removes a meaningful number of garden pests. If the nest is high in a tree, well away from foot traffic and doorways, leaving it alone through the season is a reasonable option. The colony will die off naturally with the first frost, and the nest won’t be reused.
Removing an Active Nest
If the nest is close to a doorway, walkway, play area, or anywhere people regularly pass within a few feet, removal may be necessary. This is not a good DIY project. Bald-faced hornets are most active during the day, and disturbing the nest at any hour risks provoking a mass attack. The colony can number in the hundreds, and each individual can sting repeatedly.
Professional pest control technicians have protective equipment and application methods designed to neutralize the colony before physically removing the nest. Given the 3-foot defensive perimeter and the hornets’ willingness to pursue perceived threats well beyond that range, hiring a professional is the safest approach for any nest within regular human reach. If you’re unsure whether the nest is active, watch it from a safe distance for 10 to 15 minutes. Active nests will have a steady stream of hornets entering and leaving through an opening near the bottom.