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PEST LIBRARY / WASPS & HORNETS / BALD-FACED HORNET

BALD-FACED HORNET INFORMATION & FACTS

The bald-faced hornet (Dolichovespula maculata), also known as the white-faced hornet, is a large social wasp that lives in a colony. It is not a true hornet, rather is more like wasps.

It is distinguished by a black body and ivory-white markings on its face, thorax, legs and abdomen. Adults average 15-20mm in length, making them larger than yellow jackets.

They are most active during the day consuming sugary liquids like nectar or juices. Worker bald-faced hornets bring back insects or carrion for the larvae in their nest. Bald-faced hornets have a positive effect on our environment. They help pollinate flowers while in pursuit of nectar, and they help decrease populations of nuisance insects.

They are widespread throughout North America, with aerial nests built of paper, which hang from trees, buildings, bushes, shrubs and overhangs. These nests are often away from people. By the end of the summer these nests can be very large, similar in size for a basketball, and containing up to 700 workers.

Sometimes, white-faced hornet nests are built on homes, garages or sheds that are near humans. In these cases, they become a serious concern due to their very aggressive nature. Like yellow jackets, they will fiercely defend their nest, and can sting more than once. They will also chase their victim long distances to sting them.

A bald-faced hornet colony begins in the spring. A fertilized female awakes from overwintering and will begin to construct the nest she will reign over. The paper-like nests are made from a paste she makes by chewing cellulose from rotted or weathered wood. Nests can survive winters; however, they are not re-used by a queen or colony. With every spring, there are new queen bald-faced hornets, and new nests. She lays a single egg inside each cell as she constructs her new nest. These eggs will hatch into larvae and feed on nectar and other insects provided by the queen until they mature into infertile female workers. They help by expanding the nest, finding food and caring for the queen and her young hornets.

Male bald-faced hornets are hatched in late summer, along with fertile females. Post mating, fertilized females seek protective shelter to overwinter (hibernate) until the spring, when they will become the next generation of queens. All other bald-face hornets die once winter sets in.

A key way to prevent bald-face hornets issues from happening in the late summer and fall is to regularly inspect your home, business, and any nearby structures on your property all summer for active nests. As soon as these pests are discovered, it is key to dispose of the nest or have the nest treated if it is non-visible. Even if the nests are not bothersome at the moment they are found (perhaps it is on the far end of the garage away from the patio and entry points, we advise that they be addressed quickly. The longer the bald-face hornet nest remains active, the larger the colony grows, and come fall, fertilized queens will leave their nest and seek places to overwinter, which could be your home or business.

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Trevor Dixon
3 weeks ago

I want to thank Sarah! She really did a amazing inspection! I had a issue with mice. Sarah cover the inside and outside taking care of holes/gaps above the front and back doors. attics and garage. And has a very caring attitude towards her clients! I have know about Environmental Pest control for many years as they looked after issues with a school board I worked for.


Margo Dixon
3 months ago

We just had a fall treatment done at our country property. We never hesitate to call this company to protect us from ladybugs, cluster flies and more. You can count on them for punctuality, professionalism and thoroughness. Shout out to Cody who went above and beyond today: on his own accord, he brought our garbage/recycling bins to our garage door from the road and was able to retrieve a helium balloon that had floated up to the top of our cathedral ceiling. We are seniors, so these gestures of kindness were most appreciated. Highly recommend!


Sherrie Lee Hawley
5 months ago

I cannot rate this company high enough. I first talked with Thomas on the phone. He was so polite and patient with this 79 year old lady animal advocate. He talked me through everything and I made my choice of the service I desired. I got an appointment the next day. Craig was right on time and he went through everything again and made sure I understood the whole procedure. I feel I got a very fair price for the work done. Do not hesitate to call Environmental Pest Control if you need help with wasps as I did!


Heather Lundberg
3 months ago

I recently had the bait boxes refilled to avoid having mice move into my house as the weather turns colder. Mike and Jake arrived at the appointed time. Both gentlemen were polite, friendly and very professional. When they left, I contacted Kassandra to arrange payment. She was lovely, pleasant and polite, a pleasure to speak with. I have used the services of this company for years and have always been pleased.