Backyard Ecology™ - Wasps: Victims of an Often Undeserved Reputation

Wasps: Victims of an Often Undeserved Reputation

02/18/21 • 64 min

Like many people, I grew up with a healthy.... apprehension (ok, fear) of wasps. And, of course, I’ve seen all the memes on social media vilifying wasps and calling them names that I’m not going to repeat on this podcast.

But, those fears and concerns are mostly unfounded and misplaced. Wasps generally aren’t going to bother you, especially when they are on flowers, and they definitely aren’t the evil villains they are often portrayed as. Instead, they are a vital part of the ecosystem that helps control many different insect and arachnid populations, as well as, helps with the pollination of some plants.

In this episode of the Backyard Ecology podcast, we talk with Heather Holm. Heather is a pollinator conservationist and award-winning author. As of this recording, her book, Wasps: Their Biology, Diversity, and Role as Beneficial Insects and Pollinators of Native Plants, has just been published. Because wasps are such diverse organisms, her book focuses on the wasps that we are most likely to find visiting flowers.

Of course, I had to start our conversation by asking Heather the obvious question – “Why wasps?” Her answer was that as pollinator gardens become more popular, more people are beginning to notice wasps visiting the flowers. Her goal with this book is to help people better understand and appreciate those wasps, instead of being afraid of them.

In many ways, wasps are just like bees. In fact, bees evolved from wasps. Most adult wasps feed on nectar and other sugary substances like honeydew and tree sap. However, unlike bees which gather pollen to feed to their larvae, wasps hunt for prey to feed their larvae. The specific type of prey they hunt for depends on the species of wasp.

Wasps can be very specific with the prey they capture. For example, the cicada killer only hunts cicadas. In some cases, the cicada she captures may be 2-3 times her size! Another species of wasp, called the queen ant kidnapper ant, only eats queen ants that still have their wings and are coming back from their nuptial flights. There are also a number of wasp species that hunt spiders.

Just about every type of insect, plus spiders, is on the menu for some species of wasp and this has led to a wide diversity of wasp species. There are way more species of wasps than bees. And because their prey is so specific, you may find several different species of wasps nesting in close proximity to each other because their different diets mean that they aren’t competing with each other.

Like bees, most of our wasps are solitary which means that each female must create and provision her own nest(s). This doesn’t leave them much time, or desire, to defend their nests. Also like bees, wasps can be found nesting below ground, in standing dead trees, in logs, and in pithy or hollow stems. Some wasps even build nests made entirely of mud. Some of these mud structures can be very beautiful and delicate pots that look like they should be ceramic vessels in a dollhouse.

Despite their many similarities to bees, wasps are a group of animals that many people love to hate. However, they are rarely as bad as they are made out to be, especially when they are feeding on flowers. As Heather puts it, “the flower restaurant isn’t defended.” And in some ways, wasps can be easier to identify than bees. If you want to identify the wasps that you find on your flowers, Heather suggests taking lots of pictures including a top-down view, a sideview, and a head-on view. Using your flash can also be helpful for picking up details and reducing the blur if the wasp doesn’t sit perfectly still for you.

I encourage anyone who is interested in learning more about wasps, including how to identify them, to take a look at Heather’s book. And if you aren’t quite ready to venture into the world of wasps, then I still encourage you to take a look at Heather’s website. It is a treasure trove of free educational resources on pollinators, especially native bees. (In addition to her new wasp book, she has several other books on bees, pollinators, and native plants.)

Links:

Wasps: Their Biology, Diversity, and Role as Beneficial Insects and Pollinators of Native Plants [hardcover] Heather N. Holm February, 2021 *
Heather’s website
Heather’s Facebook pages:
- Bee and Pollinator Books by Heather Holm

Links:

Wasps: Their Biology, Diversity, and Role as Beneficial Insects and Pollinators of Native Plants [hardcover] Heather N. Holm February, 2021 *
Heather’s website
Heather’s Facebook pages:
- Bee and Pollinator Books by Heather Holm

Previous Episode

More than a Mud Puddle: The Exciting World of Vernal Pools

Vernal pools are a special type of shallow wetlands that fill with snow melt and rain in late fall through early spring, then dry up sometime during the summer. Because they dry up, they are sometimes overlooked or dismissed as “not very good wetlands.” However, they serve an important role in the ecosystem and can be teeming with all kinds of life.

In this episode, we talk with Tom Biebighauser about vernal pools. Tom is a wildlife biologist, wetland ecologist, educator, and author. He has written multiple books about vernal pools and has made a career of restoring and creating wetlands. Throughout our conversation, Tom shares many stories about creating vernal pools on his own property, on other people’s properties, and at schools.

Almost by definition, vernal pools don’t contain fish, because fish wouldn’t be able to survive when the vernal pool dries up. However, because they don’t have fish, vernal pools are extremely important breeding sites for frogs, toads, salamanders, and many aquatic invertebrates. In more permanent bodies of water, those animals and their eggs, tadpoles, and larva would face a significant threat of being eaten by hungry fish, but that’s obviously not a risk in a place where there aren’t any fish.

In many states, 90% of our wetlands have been drained and filled. This is especially true for vernal pools, probably because they do dry out for part of the year. Vernal pools are often relatively small – sometimes only the size of a living room or even smaller. They are also very shallow, usually only inches to maybe a foot or so deep, and have gently sloping sides.

One of the reasons that wetlands are often drained is for mosquito control. However, mosquitoes typically aren’t a problem around vernal pools because the mosquito eggs and larvae are eaten by everything that is in the vernal pool. If a vernal pool or wetland holds water for more than a couple of months then it will attract frogs, dragonflies, damselflies, and other mosquito predators.

Many people are probably familiar with the concept of rain gardens and may even have a rain garden already. However, vernal pools differ from rain gardens in that vernal pools hold water for several months, while rain gardens go dry much faster. Because rain gardens typically only hold water for a few hours to a few days, they don’t develop the complex ecosystems of a vernal pool.

There are lots of opportunities to create vernal pools around our homes, on our school grounds, or in other places within our communities. The cost of creating a vernal pool can range from practically nothing, to a few hundred dollars, to several thousand dollars, depending on the size of the vernal pool you want to create, the type of soil you have, and how much labor you want to do yourself. However, in many cases there are funds available to help cover the costs of creating vernal pools or other shallow wetlands. Tom has written several books that walk you through how to create vernal pools. His books plus lots of free resources and guides are available through his website.

Links:

Tom’s website
Tom’s books
- A Guide to Creating Vernal Ponds (free download)
- Wetland Drainage, Restoration, and Repair *
- Wetland Restoration and Construction A Technical Guide *
Tom’s email: [email protected]
Other resources Tom recommends:
Backyard Ecology's website
My email: [email protected]

Episode image:

Vernal pool created at McBrayer Elementary school
Photo credit: Thomas Biebighauser

Next Episode

Clovers! Native Clover Conservation, Clover Yards, and More

Clovers are often suggested for lawn alternatives or for incorporating into our yards to make them more pollinator friendly. Clovers can also play important roles in agriculture either in grazing systems or as cover crops in row cropping systems. In addition, they are a favorite of deer and rabbits. However, most (if not all) of the clovers in these systems and that we typically think of are exotic species. Our native clover species are not nearly as well known.

In this episode of the Backyard Ecology podcast, we talk with Jonathan Kubesh. Jonathan is a PhD student at Virginia Tech University who is studying clovers. Jonathan brings a unique perspective to this topic, because although much of his work focuses on native clovers and native clover conservation, his field of study is in agriculture and agronomy. This allows him to serve as a valuable bridge between the two fields and areas of interest.

While the term “clover” is often loosely used for several different genera of plants, true clovers all belong to the genus Trifolium. In the eastern U.S., we have approximately 10 different species of native clovers in the Trifolium genus. We also have a number of exotic species, such as the familiar white clovers that can be found in our yards and fields.

Many of our native clovers are threatened or endangered. Some of our native clovers are tied to very special soil conditions and habitat types such as the limestone glades in the Nashville, TN area or the shale barrens which can be found in parts of Virginia, Maryland, and Pennsylvania. Other native clover species are tied to disturbance regimes that no longer exist, such as fire or short-term, intensive grazing by bison or deer.

In our conversation, Jonathan and I discuss many different topics. A large part of our conversation is devoted to native clovers. Our discussion about native clovers covers their biology, the conservation efforts surrounding them, how agriculture and horticulture may play a role in those conservation efforts, the importance of keeping good records, and the valuable role of historical collections and herbarium records in helping to discover new populations and in guiding restoration efforts.

Jonathan and I also talk about establishing clover yards and some of the factors that you might want to consider when deciding whether a clover yard is right for you. Like with so many other things in life, there isn’t one single answer that will fit all situations. However, Jonathan does an excellent job of discussing possibilities for different situations and for pointing us towards how to find more specific local help for determining the best option for our own unique situations.

Links: