Nope, That’s Not a Bee

Eastern calligrapher fly - toxomerus geminatus - for blog

Eastern calligrapher fly (Toxomerus geminatus)

When I first started photographing insects, I noticed — but didn’t really look at — lots of little “bees.” I noted their brown and yellow abdomens and quickly dismissed them as uninteresting. But once I actually photographed one of them and looked at it, I was enchanted by the pretty patterns I saw, and wanted to study them further. As an example, notice the intricate designs on the one in that first photo above.

I learned that they aren’t bees at all; they’re a family of insects known as hover flies or flower flies. Many of them resemble not only bees, but wasps as well. It’s believed that this mimicry aids their survival by making potential predators think twice before attacking them. A simple way to distinguish flies from bees or wasps is the number of wings; flies only have two wings, whereas bees and wasps have four.

My familiarity with taxonomic structures is mostly limited to my high school memories of reciting “Kingdom, phylum, class, order, family, genus, species.” I’m doing the best I can to make sure I give accurate information about scientific classifications here, but keep in mind that I’m a real amateur in insect identification. I write these articles to educate myself as much as to entertain and educate my readers. 🙂 And, if you read something here that’s wrong, I’d really appreciate hearing from you so I can correct it.

taxonomic hierarchy graphic

So, within the Insecta class, there are further subdivisions called orders. For example, the order Odonata contains my beloved dragonflies and damselflies. The order Hymenoptera contains bees, ants, and wasps. These hover flies are in the order Diptera. And within that order, they’re in the family Syrphidae (and are thus also known as syrphid flies).

So whether you call them hover flies, flower flies, or syrphid flies, you should know that they are valuable pollinators in the garden.

Prairie gentian with American Hoverfly for blog

Hoverfly on Prairie Gentian (Gentiana puberulenta)

And if you have aphid problems, you’ll be happy to find out that the larvae of syrphid flies are little wormlike creatures that are ravenous consumers of aphids. If you see these lovely little flies in your yard, keep your fingers crossed that they like it enough to stick around and lay their eggs there. You can make it easier for them by not removing leaves from your garden in the fall because that’s where they spend the winter.

These flies really seem to love the ubiquitous asters that are blooming in the early fall, and that makes it easier for me to find and photograph them. I just walk up to a group of asters and wait until they show up. This is one of my favorite recent photos of a syrphid fly on asters:

Oblique Stripetail - Allograpta obliqua on aster

Oblique stripetail (Allograpta obliqua) on asters

Interestingly, hover flies share some extraordinary capabilities with dragonflies: they can hover, and fly forward, backward, sideways, up, and down.  Their flight abilities make them fascinating to watch; I can easily lose track of time when I’m focused on watching them zipping around a patch of flowers, feeding on the nutritious nectar and pollen.

Narrow-headed sunfly - Helophilus fasciatus w sig

Narrow-headed sunfly (Helophilus fasciatus)

Chrysotoxum sp of hover fly v2

This one is in the genus Chrysotoxum, but I don’t know which species

I plan to continue my study of these syrphid flies, and will hope to be able to write more about them in a future post.  If you get a chance, pull up a chair beside a group of asters or goldenrod soon and see if you can catch a glimpse of any of these charming flower visitors.

There’s a little bonus for you below, but I just want to share one more photo.  One day I was watching this Chinese mantis as it preyed upon bees from its perch on top of a cushion of goldenrod. In this photo, the mantis is eating a honeybee while a syrphid fly feeds only a couple inches from its head, seemingly unconcerned about the monster lurking beside him. Perhaps he realized the mantis was occupied and was no immediate danger to him.

Syrphid fly watches as Chinese mantis eats honeybee

Bonus Deep Dive Content: Okay, if you’re interested in watching a syrphid fly larva eat an aphid, you can spend 25 minutes watching this amazing video I found on YouTube by someone called “Insect Man.” I confess I fast-forwarded through some of it, but it’s way cool.

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4 Responses to Nope, That’s Not a Bee

  1. You are so much fun, I literally never know what to expect to find in this newsletter. Just fascinating Kim. – Marian

  2. Littlesundog says:

    Lots of valuable and interesting information here, but it’s overwhelming, isn’t it? I’m glad you don’t have pop quizzes after reading a post! I’d flunk for sure! But WOW!!! What a great world it is out there!

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