For non aggressive wasps I've had great luck spraying the nests with this Spectracide wasp remover in the evening. For more aggressive wasps I also use this rediculous looking upper torso Beekeeping suit. It seems silly, but trust me, it's amazing.
You notice a large wasp with a bold black and white pattern landing near your back door. Is it dangerous? Should you be worried? The black and white color pattern actually belongs to a handful of distinct wasp species, ranging from one of the most aggressive nest defenders in North America to entirely harmless backyard guests.
This guide identifies every common black and white wasp homeowners encounter, explains what distinguishes them from each other, and gives you a clear picture of how to respond safely.
For a broader overview of wasps with dark coloring, see our complete guide to black wasps.
| Species | Size | Key Markings | Nest Type | Aggression |
|---|---|---|---|---|
| Bald-faced hornet | 3/4”–1” | White face, white abdomen tip | Large aerial paper nest | High near nest |
| White-banded mason wasp | 1/2”–3/4” | White band across abdomen | Existing cavities | Very low |
| Four-toothed mason wasp | 1/2”–3/4” | Single white band, top of abdomen | Existing cavities | Very low |
| Pelecinid wasp | 1”–2.5” | All black, extremely long abdomen | No nest (parasitic) | Essentially none |
| Spider wasp (Poecilopompilus) | 3/4”–1” | Black with pale spots/bands | Ground burrows | Low |
When most homeowners think of a black and white wasp, they’re picturing the bald-faced hornet (Dolichovespula maculata). Despite its name, the bald-faced hornet is technically a yellowjacket — classified in the family Vespidae — though it behaves more like a hornet than a typical yellowjacket.
Bald-faced hornets are unmistakable once you know what to look for:
These markings distinguish bald-faced hornets clearly from yellowjackets (which have yellow, not white) and from paper wasps (which are usually brown-orange with yellow banding).
Bald-faced hornets are social insects — they live in colonies that can swell to 400–700 workers by late summer. Colonies begin each spring when a fertilized queen emerges from winter dormancy and starts building a nest from scratch using chewed wood pulp.
The nest is the key identification feature: bald-faced hornets build large, football-shaped paper nests suspended from tree branches, eaves, shrubs, utility poles, or exterior walls. A mature nest can reach 14–24 inches in length. Unlike yellowjacket nests built underground, bald-faced hornet nests are always above ground.
Bald-faced hornets are highly defensive of their nests. Unlike most solitary wasps that ignore humans unless directly handled, bald-faced hornets will sting aggressively if they perceive their nest as threatened. They can sting multiple times and release alarm pheromones that recruit additional workers to attack.
Away from the nest, individual foragers are not particularly aggressive and will fly away from most disturbances. The danger zone is within several feet of an active nest.
Sting characteristics: Bald-faced hornet stings are painful and cause localized swelling. People with known wasp venom allergies face the same anaphylaxis risk from bald-faced hornets as from other wasps. Multiple stings can be dangerous even for non-allergic individuals.
For complete information on identification, nest management, and removal, see our bald-faced hornet guide.
The white-banded mason wasp (Ancistrocerus antilope) and closely related species like Ancistrocerus campestris are solitary wasps that share the bald-faced hornet’s striking black and white palette — but pose almost no risk to homeowners.
The main visual difference from a bald-faced hornet: mason wasps are noticeably smaller, have a more slender body shape, and lack the hornet’s distinctive all-white face. The bald-faced hornet has white covering most of its face; mason wasps have smaller, scattered white markings.
White-banded mason wasps are solitary — each female nests and provisions eggs on her own with no workers or colony. They do not build paper nests. Instead, females use existing cavities: hollow plant stems, holes in weathered wood, old beetle burrows in trees, and sometimes gaps in masonry or siding.
Females provision each brood cell with paralyzed caterpillars or other moth larvae. They seal each cell with mud after placing an egg, which is the source of the “mason” name.
For homeowners: Mason wasps are entirely beneficial. They control caterpillar populations in gardens and pose virtually no sting risk. A mason wasp nesting in an old fence post or hollow stem is a natural pest controller. There is no need for intervention unless they’re nesting in a location that creates unavoidable daily contact.
The four-toothed mason wasp (Monobia quadridens) is closely related to white-banded mason wasps and found across eastern North America. Its name refers to the four small tooth-like projections on its mandibles — visible only up close.
The four-toothed mason wasp can be distinguished from other mason wasps by the position of its white band — it sits at the very top of the abdomen, closer to the waist, rather than toward the middle or tip.
Like all mason wasps, the four-toothed mason wasp is solitary, non-aggressive, and beneficial. It parasitizes caterpillar pests in gardens and orchards.
The pelecinid wasp (Pelecinus polyturator) is one of the most distinctive insects in North America — and one that homeowners frequently find alarming because of its unusual appearance. While it is technically all black (no white), its startling body form makes it one of the most frequently misidentified “black and white wasps” in image searches.
The pelecinid wasp’s all-black coloration with that dramatic elongated body makes it stand out from every other common wasp species.
Pelecinid wasps are parasitoids — they use that long abdomen to probe soil and locate the underground grubs of June beetles (Phyllophaga species, also called May beetles). The female inserts an egg directly into the grub; the hatching larva feeds on and eventually kills the host.
Sting risk: Essentially none. The pelecinid wasp’s elongated “tail” is an ovipositor (egg-laying structure), not a functional stinger. The species cannot sting humans. Despite their impressive size and alien appearance, pelecinid wasps are completely harmless.
If you see a very large, slender, entirely black insect with an improbably long abdomen hovering low over a lawn, it’s almost certainly a female pelecinid wasp searching for beetle grubs.
Several spider wasps in the family Pompilidae display black and white or black and pale patterns. The most commonly encountered is Poecilopompilus interruptus and related species.
Spider wasps are active, fast-moving, and frequently seen running along the ground or low vegetation with their wings flicking rapidly. This nervous wing-flicking behavior is a key field mark.
Spider wasps are solitary hunters. Females hunt, paralyze, and drag spiders back to ground burrows where they deposit eggs. Each spider becomes living food for one larva.
Sting risk: Low. Spider wasps can sting if grabbed or trapped but are not defensive of their nesting sites the way social wasps are. Their sting is painful but brief. For comparison, the tarantula hawk — a giant spider wasp — delivers one of the most painful insect stings known, but the pain is short-lived and most spider wasps are far milder. Females are focused on hunting, not defending territory.
The single most important factor is social vs. solitary:
Social wasps (can be dangerous near nests):
Solitary wasps (almost always harmless):
If you’re seeing a black and white wasp near a large, papery, enclosed nest attached to a tree, eave, or structure — you’re almost certainly looking at bald-faced hornets. Give the nest a wide berth and treat it with caution.
If you’re seeing a lone black and white wasp flying through your garden, hovering over bare soil, or entering a small hole in wood — it’s almost certainly a solitary species and poses no meaningful danger.
With the exception of bald-faced hornets near human activity areas, black and white wasps are genuinely beneficial to have around:
Eliminating solitary black and white wasps from your yard provides no benefit and removes a layer of natural pest control.
If it’s a lone wasp (probably solitary):
If you find a large paper nest (bald-faced hornets):
For detailed removal guidance, see our complete wasp nest removal guide.
Contact a pest control professional if:
What is the large black and white wasp in my yard? The most common large black and white wasp in North America is the bald-faced hornet (Dolichovespula maculata). If it’s near a large paper nest, that’s almost certainly what you have. If it’s a lone wasp without a visible nest, it may be a mason wasp or spider wasp — both harmless.
Are black and white wasps aggressive? It depends on the species. Bald-faced hornets defend their nests vigorously and will sting repeatedly if the nest is threatened. Mason wasps, pelecinid wasps, and spider wasps are solitary and non-aggressive — they’ll only sting if directly handled.
Should I remove a black and white wasp nest? Only if the nest belongs to bald-faced hornets and is located where regular human activity creates a safety risk. Solitary black and white wasps (mason wasps, etc.) do not build large shared nests — a single female nesting in a wood cavity or soil burrow poses no meaningful risk and benefits your garden.
What do black and white wasps eat? Adults of most species feed on nectar and are important pollinators. Females of predatory species (spider wasps, mason wasps) hunt insects or spiders to provision nest cells for larvae. Bald-faced hornets chew insects to produce a protein-rich pulp fed to larvae.
Can I kill the black and white wasps in my garden? Solitary black and white wasps (mason wasps, pelecinid wasps, spider wasps) should be left alone — they are harmless and beneficial. Bald-faced hornet colonies near high-traffic areas can be treated if needed, but colonies die off naturally each winter, so late-season nests in low-risk locations often don’t require action.