Wasps

Category

Flying Insects

Actual Size

1 to 2.5 cm (varies by species)

Characteristics

Slim bodies with narrow waists, smooth bodies with minimal hair, bright yellow and black coloration common in many species.

Legs

6

Antennae

Yes

Wings

Yes, two pairs (forewings and hindwings)

Habitat

Builds nests in sheltered outdoor areas such as trees, eaves, wall voids, and attics. Commonly found near food sources, garbage, and flowering plants.

Pest Overview

Wasps are flying insects known for their narrow waists, bright colors, and powerful stings. Unlike bees, wasps can sting multiple times, which can make them more aggressive when defending their nests.

Common types include yellowjackets, paper wasps, and hornets. While wasps play a role in pollination and insect control, their stings can pose a health risk, especially to individuals with allergies.

Identification

Wasps are distinguishable by their slender bodies, smooth, shiny exoskeletons, and vibrant black and yellow or black and brown coloration.

They have two pairs of wings and a distinct “pinched” waist that differentiates them from bees. Yellowjackets are smaller, while hornets and paper wasps are larger, with slight differences in body shape and coloration.

Habitat and Behavior

Wasps build nests in a variety of locations, including trees, eaves, and wall cavities.

Some species construct paper-like nests made from chewed wood fibers, while others dig burrows underground.

Wasps are typically more active during warmer months, particularly late summer and early fall when they become more aggressive as they search for food.

They are social insects, living in colonies that can range from a few dozen to several thousand wasps.

Signs of Infestation

Visible Nests: Nests are often seen hanging from eaves, branches, or tucked in hidden areas like wall voids.
Wasp Activity: Increased numbers of wasps flying around trash bins, outdoor eating areas, or flowering plants.
Aggressive Behavior: Wasps become more aggressive near their nests and may swarm if they feel threatened.

Health and Property Risks

Wasp stings are painful and can be dangerous, especially to those who are allergic.

A single sting can cause severe reactions, including anaphylaxis in sensitive individuals. Unlike bees, wasps can sting multiple times, increasing the risk in case of an attack.

Additionally, wasp nests in attics, walls, or on structures can cause structural damage over time as nests expand.

Prevention Tips

Seal Entry Points: Close off cracks and crevices where wasps might enter wall voids or attics.
Secure Trash and Food: Keep trash bins tightly closed, especially outdoors, and clean up any spills or food residue.
Limit Sweets and Proteins Outdoors: Wasps are attracted to sugary foods and protein sources, so be cautious with outdoor meals.
Plant Placement: Keep flowering plants away from entryways, as they attract wasps looking for nectar.

Control and Treatment Methods

Wasp Traps: Use wasp traps to reduce local populations, especially around outdoor dining areas.
Nest Removal: Remove nests carefully when they are small, or contact professionals for large or hard-to-reach nests.
Insecticide Sprays: Apply wasp-specific insecticides directly on nests during cool times (like early morning) when wasps are less active.
Professional Pest Control: For large infestations or nests in difficult areas, professional exterminators are equipped to handle wasps safely and effectively.

Interesting Facts

Some wasp species are solitary and do not build colonies; they lay eggs in the bodies of other insects to feed their larvae.
Wasps are beneficial to the environment, as they help control other pest insect populations through predation.
In late summer, wasps switch from a primarily protein-based diet to seeking out sugars, which is why they are more noticeable around food and drinks.

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Yellowjackets