What Do Yellow Jackets Eat?

Yellow jackets, a type of aggressive wasp, often become unwelcome guests at picnics, barbecues, and around homes across the United States. Understanding their dietary habits not only helps you comprehend their behavior but is critical to effectively preventing infestations and avoiding painful stings.

This guide explores the dietary preferences of yellow jackets throughout different seasons, their attraction to residential properties, and practical prevention measures homeowners can adopt.

What Exactly Do Yellow Jackets Eat?

Yellow jackets are omnivorous insects, which means their diet consists of both animal-based proteins and sugary substances. This versatile diet contributes significantly to their ability to thrive in various environments, including urban and suburban areas. Protein Sources Protein-rich food is an important part in the process for yellow jacket’s larvae development. Adults ant extensively search for protein rich food to feed their larvaes, and also hunting insects such as:

• Flies
• Caterpillars
• Spiders
• Ants
• Beetle larvae

Yellow jackets capture these insects, chew them into a paste, and feed this protein-rich meal to their larvae, who, in return, secrete a sugary substance consumed by adult yellow jackets. Sugary Foods Adult yellow jackets primarily rely on carbohydrates to sustain their energy levels. Their favorite sugary foods include:

• Nectar from flowers
• Honeydew from aphids
• Tree sap
• Sweet fruits (especially overripe or fallen fruits)
• Human foods like soda, fruit juice, candies, and desserts

In late summer and early fall, yellow jackets actively seek sugary foods as their colonies mature, making them particularly problematic for homeowners.

How Yellow Jackets’ Diet Changes With the Seasons

The dietary choices of yellow jackets gets evolved with their changing lifecycle patterns, significantly impacting their behavior around homes. Spring: Protein for Growing Colonies In early spring, newly emerged queen yellow jackets focus on finding a suitable nesting spot and laying eggs. Initially, the queen consumes sugary nectar and sap for energy. However, as eggs hatch into larvae, the demand for protein increases sharply. Workers hunt insects actively to feed the developing larvae. During this period, protein sources are abundant, and yellow jackets often prey on:

• Caterpillars
• Flies
• Spiders
• Other small insects

Summer: Peak Protein Demand Throughout summer, the colony rapidly grows, and the demand for protein remains high. Workers actively hunt insects to meet this nutritional requirement. This hunting activity can be beneficial, as yellow jackets control garden pests like caterpillars and flies, helping maintain the balance within the ecosystem. Late Summer and Fall: Sugary Foods and Human Interaction By late summer and early fall, colonies reach their peak size, and the need for protein declines as fewer larvae require feeding. Adult yellow jackets now shift their focus toward sugary foods to sustain themselves. This is when homeowners most often encounter yellow jackets, as they aggressively seek out sweets:

• Sugary beverages (sodas, juices)
• Desserts and pastries
• Fruits, especially ripe or fallen fruit
• Open garbage bins containing food residues

Autumn: Increased Aggression and Scavenging In late summer and autumn, natural food sources become scarce and therefore it is high in demand. Yellow jackets become bolder and more aggressive in their scavenging behavior, significantly increasing the likelihood of human encounters. Outdoor meals and garbage containers become prime targets during this period, increasing the risk of stings. Winter: Dormancy and Reduced Activity As winter approaches, worker yellow jackets and male drones die off, leaving only fertilized queens to hibernate through the colder months. During hibernation, queens do not eat but instead survive off stored fat reserves, waiting until spring to restart the cycle.

How Diet Influences Yellow Jacket Behavior

Understanding what yellow jackets eat helps homeowners comprehend their behavior and aggression. During late summer and autumn, limited natural food supplies significantly increase their aggression and boldness in scavenging human food sources. This behavioral shift increases the risk of very painful stings and high potential allergic reactions among highly risk prone and sensitive individuals.

Professionals are equipped with advanced protective gear and have the expertise to handle nests safely, significantly reducing the risk of injury.

If you feel things have gone out of control, it is advised to contact pest control professionals. Our team can provide a customized approach to protect your home effectively.

Visit our Species, Control, and DIY Guide sections for additional resources on yellow jackets and ways to tackle a yellow jackets infestation.