The insect commonly called a “red jacket” isn’t actually a bee. It’s almost always the European hornet (Vespa crabro), a large social wasp with a distinctive brick-red and golden-yellow body that sets it apart from the more familiar black-and-yellow yellowjacket. At ¾ to 1⅜ inches long, it’s noticeably bigger than most wasps you’ll encounter, which is why people often search for it after a startling backyard sighting.
What a Red Jacket Actually Looks Like
European hornets have a brick-hued reddish-brown body with golden yellow on the abdomen and face, plus darker markings along the thorax and abdomen. The most reliable identification feature is a series of teardrop-shaped marks running down the abdomen. These markings distinguish it from other large wasps, including the northern giant hornet, which lacks those teardrop patterns entirely and has a fully yellow head.
Size is another giveaway. European hornets are among the largest social wasps in North America, roughly twice the length of a standard yellowjacket. Queens can push past an inch and a third. If the insect you saw was reddish, bigger than a yellowjacket, and had visible teardrop-shaped abdominal markings, you’re almost certainly looking at a European hornet.
How They Differ From Yellowjackets
Yellowjackets are smaller, with bold black-and-yellow striping and a compact, hairless look. They’re aggressive scavengers that show up uninvited at picnics and trash cans. European hornets, by contrast, are less interested in your food. They primarily hunt other insects and are attracted to light at night, something yellowjackets don’t do. If a large reddish wasp is buzzing around your porch light after dark, that’s a strong clue it’s a European hornet rather than a yellowjacket.
Paper wasps are another common point of confusion. They’re slender with long dangling legs and build small, open-comb nests that rarely exceed the size of an outstretched hand. Their colonies are tiny, between 15 and 200 individuals. European hornets build enclosed paper nests that can house vastly larger colonies.
Nesting Habits and Colony Size
European hornets and their close relatives build nests from paper fibers, which they create by scraping wood and mixing it with saliva. The result is a layered structure with multiple tiers of vertical cells, all wrapped in a paper envelope with a single entrance hole. You’ll find these nests in tree hollows, wall voids, attic spaces, and sometimes old rodent burrows in the ground. If the existing cavity isn’t large enough, the wasps will actually moisten the surrounding soil and excavate to expand it.
A single queen starts each colony in spring, and by late summer the population can reach anywhere from 1,500 to 15,000 individuals depending on species and conditions. Colonies are annual. They die off in winter, and only newly mated queens survive to start fresh the following spring. This means a nest you find in October will be naturally abandoned within weeks.
How Painful Is the Sting?
Wasp stings rate a 2 to 3 on the Schmidt Sting Pain Index, which runs from 0 to 4. For context, a honeybee sting is a 2. Wasps can deliver roughly twice the force of a bee sting, though the average wasp sting injects only about one-tenth the venom of a honeybee sting. The trade-off: wasps can sting repeatedly, while honeybees sting once and die.
Most stings cause localized pain, redness, swelling, itching, and warmth around the site. These symptoms typically resolve within hours, though they can linger for a day or two. In about 10% of cases, a larger local reaction develops: swelling that can expand up to 4 inches beyond its normal size, more intense pain, and a slower timeline. These larger reactions usually begin 6 to 12 hours after the sting, worsen over one or two days, and can last 5 to 10 days total.
A true allergic emergency, called anaphylaxis, affects multiple body systems at once. Signs include widespread hives, difficulty breathing, throat swelling, and a sudden drop in blood pressure. This requires immediate emergency medical treatment. Anyone with a known allergy to stinging insects should carry an epinephrine autoinjector.
Treating a Sting at Home
For a normal sting, apply a cold pack to reduce swelling and use an over-the-counter hydrocortisone cream on the site to control itching. An oral antihistamine like cetirizine, loratadine, or fexofenadine can also help with itching. Swelling and redness from an uncomplicated sting generally resolve within a day. If swelling persists beyond a few days, or if you notice a red line extending from the sting site toward your torso, that warrants a call to your doctor.
Removing a Nest Safely
Timing matters more than anything else. The safest window is after dusk or before dawn, when the wasps are inside the nest, cold, and sluggish. Early fall is the ideal season because colonies are already in decline and activity drops significantly. If you can wait until late autumn, the colony will die off on its own and you can remove the empty nest without any risk at all.
If removal can’t wait, keep these guidelines in mind:
- Distance: Stay 15 to 20 feet from the nest. Most commercial wasp sprays are designed to reach this distance.
- Protective clothing: Wear a full bee suit or, at minimum, thick long sleeves, heavy gloves, boots with long socks, and a veil or head covering. Stingers can penetrate thin fabric.
- Escape route: Plan a clear path away from the nest before you begin, in case the colony becomes aggressive.
- Weather: Choose a calm, still evening. Wind can scatter spray and agitate the insects.
For nests inside wall voids, attic spaces, or other enclosed structures, professional removal is the practical choice. Sealing an entry hole while a colony is active inside your walls can drive agitated wasps further into your living space.