6 Common Wasps in Utah

Common wasps in Utah include paper wasps, western yellowjackets, bald-faced hornets, mud daubers, tarantula hawks, and western cicada killer wasps. They differ in size, color, seasonal activity, sting risk, and wasp nest location in Utah.

Some wasps live in social colonies and strongly defend their nests, while others live alone and rarely sting people. Their nests can range from exposed paper combs and enclosed aerial nests to underground burrows and mud cells.

Key Takeaways

• Common wasp species in Utah vary greatly in appearance and behavior, from small social yellowjackets to solitary wasps that can reach about 2 inches long.
• The type of wasp nest is one of the clearest identification clues. Paper wasps build exposed combs, bald-faced hornets build enclosed aerial nests, and western yellowjackets often use hidden ground or structural cavities.
• Western yellowjackets and bald-faced hornets present greater concern near active nests since workers can sting repeatedly and strongly defend their colonies.
• Mud daubers, tarantula hawks, and western cicada killers are solitary wasps and do not defend large communal colonies.
• Season helps narrow identification. Social colonies grow from spring through summer, while western cicada killers are especially noticeable during July and August.

What Types of Wasps Are Common in Utah?

The types of wasps common in Utah include paper wasps, western yellowjackets, bald-faced hornets, mud daubers, tarantula hawks, and western cicada killer wasps.

1. Paper Wasps

Paper wasps have a slim body, a very narrow waist, and long back legs that hang down while they fly. Native western paper wasps and invasive European paper wasps can both be found in Utah.

• Appearance:
  
  • Queens are about 3/4 inch long, while workers are usually 1/2 to 5/8 inch.
  • Colors range from dark brown and reddish-orange to yellow-and-black patterns.
  • Their bodies look smooth, with little visible hair.
• Typical Nest Location:
  
  • Their paper nests have a single exposed comb with visible cells, giving them an upside-down umbrella shape.
  • Protected sites include eaves, overhangs, deck railings, trees, and outdoor equipment.
• Most Active in Season: Fertilized queens survive winter and start new colonies in spring. Worker numbers increase through summer, with activity generally most noticeable from early summer through fall.
• Concern Level: Moderate near an active nest.
  
  • They usually become defensive when their nest is disturbed.
  • Nests near doors, patios, play areas, and other frequently used spaces create a greater sting risk.
  • Paper wasps also hunt caterpillars and other insects to feed their developing young.

2. Western Yellowjackets

Western yellowjackets are stocky social wasps with concealed colonies and a strong defensive response when their nest is disturbed. They can also sting more than once.

• Appearance:
  
  • Workers are about 3/8 to 5/8 inch long, with bold yellow-and-black bands.
  • Their bodies are smooth with little visible hair, unlike the fuzzy appearance of many bees.
  • Short legs stay tucked close to the body during flight.
• Typical Nest Location:
  
  • Nests are often underground in old rodent burrows and other soil cavities.
  • Hidden colonies can also develop in wall voids, attics, crawlspaces, tree cavities, and structural gaps.
  • Repeated wasp traffic through one small opening can indicate a concealed nest.
• Most Active in Season: Queens start colonies in spring, and worker numbers increase through summer. Activity can peak in late summer, when workers frequently scavenge around garbage, outdoor food, meat, sugary items, and pet food.
• Concern Level: High around an active colony.
  
  • Workers aggressively defend their nest entrance when disturbed.

3. Bald-Faced Hornets

Bald-faced hornets are large social wasps known for their black-and-white coloring and large enclosed paper nests. Despite their name, they are a type of aerial yellowjacket, not a true hornet.

• Appearance:
  
  • Adults are about 3/4 to 1 inch long and have a robust body.
  • Their bodies are mostly black with clear white markings, including a distinctive white face.
  • They are generally larger than paper wasps and typical yellowjackets.
• Typical Nest Location:
  
  • Nests are gray, enclosed, and shaped like a football or a large teardrop.
  • They usually hang from trees and large shrubs but may also appear on eaves, siding, and other raised parts of a home.
  • By late summer, a nest can reach about basketball size and may contain up to 700 workers.
• Most Active in Season: Queens start colonies in spring, and worker numbers increase through summer. Colonies are largest, and activity is generally highest in late summer and early fall.
• Concern Level: High near an active nest.
  
  • Workers can sting repeatedly and strongly defend the colony.
  • They also hunt flies, caterpillars, and other insects to feed their developing young.

4. Mud Daubers

Mud daubers are solitary, generally non-aggressive wasps that build distinctive nests from mud. They do not form large colonies or defend a shared nest like social wasps.

• Appearance:
  
  • Adults are generally about 1/2 to 1 inch long, depending on the species.
  • Their bodies are long and slender, with a very thin, thread-like waist.
  • Colors include black, metallic blue-black, or black with yellow or pale markings.
• Typical Nest Location:
  
  • Nests are made from mud and may look like short tubes, side-by-side cells, or irregular clay-like lumps.
  • Sheltered locations include eaves, porch ceilings, open garages, window areas, sheds, and other protected surfaces.
• Most Active in Season: Nesting activity is most noticeable from early summer through fall. Females hunt spiders, paralyze them, and place them inside individual mud cells as food for developing larvae.
• Concern Level: Low in most situations.
  
  • Mud daubers rarely sting people unless physically trapped or handled.
  • Some species prey on spiders, including black widows, giving them a useful role in landscapes.

5. Tarantula Hawk Wasps

Tarantula hawks are giant solitary spider wasps known for their dark metallic bodies and bright orange wings. They do not form large colonies or defend communal nests.

• Appearance:
  
  • Adults can grow up to 2 inches long.
  • Their bodies are metallic midnight blue to black, with orange or amber wings.
  • Only females have a functional stinger, which can reach about 1/2 inch long.
• Typical Nest Location:
  
  • They favor dry, open areas with loose, well-drained soil.
  • Females use ground burrows after hunting and paralyzing tarantulas.
  • An egg is placed with the paralyzed spider, which later provides food for the developing larva.
• Most Active in Season: Sightings are most likely during the warmer months, particularly from June through September. Adults may be seen flying close to the ground while searching for tarantulas.
• Concern Level: Low encounter risk, but extremely painful sting.
  
  • These wasps are generally docile around people and usually sting when directly threatened or handled.
  • Their sting is considered among the most painful insect stings, although the intense pain is typically short-lived.

6. Western Cicada Killer Wasps

Western cicada killer wasps are large, solitary ground-nesting wasps that hunt cicadas. Their unusually large size can cause them to be mistaken for hornets or oversized yellowjackets.

• Appearance:
  
  • Females can reach about 2 inches long, while males are generally smaller.
  • Their bodies are dark brown or black with bright yellow markings across the abdomen.
  • Wings may appear amber or orange.
• Typical Nest Location:
  
  • Females dig individual burrows in bare, well-drained, sandy soil, often in sunny areas.
  • Several females may use the same suitable area, but each maintains her own nest.
  • Females paralyze cicadas and carry them underground as food for developing larvae.
• Most Active in Season: Adults are most noticeable during July and August, when cicadas are available, and females are actively provisioning their burrows.
• Concern Level: Low in most situations.
  
  • Males may fly close to people and appear defensive, but they cannot sting.
  • Females can sting but rarely do so unless trapped or directly threatened.
  • They lack the strong colony-defense behavior of social wasps.

Keep Wasps Under Control With Stewart's

Keep wasps under control with Stewart's when nests or repeated activity around your home need professional attention. Stewart's has served Utah homeowners since 1972.

During scheduled visits, Stewart's can evaluate:

• Wasp type and activity patterns
• Nest location and visible entry points
• Activity around lawns, flowerbeds, trees, and shrubs
• Nests near entrances and frequently used areas

Professional evaluation is especially important for concealed or elevated nests. Request professional wasp control from Stewart's Lawn today.

FAQs

What are the most common wasps in Utah?

The most common Utah wasps include paper wasps, western yellowjackets, and bald-faced hornets. Mud daubers and tarantula hawks also occur. Body shape, nest construction, nest location, and colony behavior provide the clearest identification clues.

Where do paper wasps build nests?

Paper wasps build nests on protected surfaces around Utah homes and landscapes. Common locations include eaves, railings, outdoor fixtures, hollow openings, branches, and sheltered structures. Their umbrella-shaped paper comb remains open, leaving individual nest cells visible.

Are mud daubers dangerous?

Mud daubers are generally less dangerous for people. They are solitary wasps and do not defend a large worker colony. Only females can sting, and even they are considered non-aggressive, usually recognized by their mud tubes or cells rather than any defensive behavior.

Are all wasps aggressive?

No, not all wasps are equally aggressive around people. Yellowjackets and bald-faced hornets can strongly defend social colonies, while paper wasps are generally less defensive. Solitary mud daubers and tarantula hawks do not defend large communal colonies.

When are wasps most active in Utah?

Wasps are most active in Utah from the warmer months through early fall, depending on the species and yearly weather. Social colonies begin with queens in spring, expand through summer, and become easier to notice as worker populations increase.