Southern Yellowjacket

vespula squamosa

The Southern Yellowjacket (Vespula squamosa) is a highly social wasp species known for its distinctive yellow and black markings and often aggressive defensive behavior. Unlike some solitary wasp species, Southern Yellowjackets live in large colonies, constructing elaborate paper nests, often underground or in sheltered cavities. These opportunistic insects play a dual role in their ecosystems, acting as significant predators of other insects, especially pest species, while also scavenging for sugars and proteins. Their complex social structure, with a queen, workers, and drones, allows for efficient resource exploitation and colony defense, making them a conspicuous and sometimes formidable presence in various southern and eastern North American habitats.

Habitat: Found in various environments, including forests, woodlands, grasslands, agricultural areas, and particularly common in urban and suburban settings where food sources and nesting sites are abundant.

Appearance

The Southern Yellowjacket is characterized by its bright yellow and black striped abdomen, featuring distinctive triangular black markings on the yellow bands, particularly noticeable on the sides. The thorax is predominantly black with yellow shoulders, and the face is largely yellow with black eyes and antennae. Workers typically measure around 1.0 to 1.7 cm in length, with queens being larger, reaching up to 2.0 cm. They possess two pairs of membranous, yellowish wings that fold longitudinally when at rest.

KingdomAnimaliaPhylumArthropodaClassInsectaOrderHymenopteraFamilyVespidaeGenusVespula

Southern Yellowjacket

Interesting facts

Colonies can grow quite large, sometimes containing thousands of workers by late summer and fall, which is when they are most noticeable and defensive.

Southern Yellowjacket queens are polygynous, meaning multiple queens can overwinter together and initiate a colony, though often only one dominant queen survives.

Their nests are made of chewed wood fibers mixed with saliva, creating a paper-like material, and are typically subterranean or in dark, protected cavities.

Unlike bees, yellowjackets can sting multiple times because their stingers are not barbed.

Special abilities

Yellowjackets are highly adaptable foragers, capable of locating and utilizing diverse food sources, from carrion and insect prey to fallen fruit and human discarded foods. This enables their colonies to thrive in varied environments.

Southern Yellowjackets are fiercely territorial and will aggressively defend their nests, utilizing a painful, venomous sting. This collective defense mechanism is a potent deterrent against predators and perceived threats.

While often considered pests themselves, yellowjackets are effective predators of other insects, including caterpillars, flies, and other soft-bodied arthropods, helping to regulate insect populations.

Measurements & details

Length: 1-2 cm
Wingspan: 2-3 cm
Weight: 0.0001-0.0002 kg
Lifespan: 0-1 years
Top Speed: 15 km/h
Incubation: 25-35 days

Diet & Feeding

Southern Yellowjackets have a varied diet, acting as both predators and scavengers. Adults primarily feed on sugary substances for energy, such as nectar, fruit juices, and honeydew, while also hunting protein-rich prey and scavenging for meat to feed their larvae.

Age differences: Adult workers primarily consume carbohydrates for energy, while they hunt and scavenge protein-rich foods (insects, meat) to feed the developing larvae, which require protein for growth.

Primary Foods

Nectar
Fruit juices
Honeydew
Flies
Caterpillars
Carrion

Foraging Method

Predatory Hunting, Scavenging

Ecological connections

hunts

Striped Skunk

Mephitis mephitis

Skunks are known to dig up yellowjacket nests to eat the protein-rich larvae.

hunts

House Fly

Musca domestica

Adults hunt these insects to feed their carnivorous larvae.

mutualism

Common Milkweed

Asclepias syriaca

Yellowjackets collect nectar from various flowering plants for energy, potentially aiding in pollination.

Traits

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Also known as

No aliases listed yet.

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Safety

Danger

1/5 · Very low

No special safety notes yet.

Frequently Asked Questions

How to identify Southern Yellowjacket?

The easiest way to identify Southern Yellowjacket is to use the Snappit nature identifier app.

How long is Southern Yellowjacket?

1-2 cm

What is Southern Yellowjacket's wingspan?

2-3 cm

How much does Southern Yellowjacket weigh?

0.0001-0.0002 kg

How long does Southern Yellowjacket live?

0-1 years

How fast can Southern Yellowjacket move?

15 km/h

What does Southern Yellowjacket eat?

Where is Southern Yellowjacket usually found?

Found in various environments, including forests, woodlands, grasslands, agricultural areas, and particularly common in urban and suburban settings where food sources and nesting sites are abundant.