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Posts Tagged ‘Kleptoparasitic bees’

Is it a bee? Is it a fly? Well, it has a fuzzy body like a bumblebee and has a long, rigid proboscis that looks like a stinger, but its patterned wings and long legs look more like those of a fly. In actuality, it is a Greater Bee Fly (Bombylius major), a parasitic bee mimic that is one of the earliest spring pollinators of wildflowers. In this case, I think the little flower was some kind of wild violet, a vital early spring nectar source for many pollinators, like bee flies.

I photographed this bee fly in early April while searching for dragonflies in Prince William County in Northern Virginia. I was quite happy to be able to capture so many of the details of this curious creature, including its long proboscis, spindly legs, patterned wings, and fuzzy body. In case you are curious, the body of one of these bee flies is about six-tenths of an inch (15mm) in length and its wing span is about one inch (25mm).

If you would like to learn more about these fascinating little bee flies, including their parasitic behavior, check out this article on the US Forest Service website by Beatriz Moisset entitled “A Pollinator with a Bad Reputation.

bee fly

© Michael Q. Powell. All rights reserved.

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Early spring wildflowers, like the Virginia Spring Beauty (Claytonia virginica), are an important source of food for a host of small bees and other insects. Many insects gather pollen from these flowers and in doing so help to pollinate the plants.

Some species of bees, though, lack  scopa (the pollen-collecting hairs) and do not collect pollen to feed their offspring. The genus Nomada, according to Wikipedia, is the largest genus of kleptoparasitic bees sometimes referred to as “cuckoo bees.” Kleptoparasitic bees are so named because they enter the nests of a host and lay eggs there, stealing resources that the host has already collected.

It is a little hard to see the body of the bee in the photo below, but if you look closely you can see its striped abdomen, which is wasp-like in appearance. I was not sure of the type of bee, so I posted it to BugGuide, a useful resource for insect identification, and one of the experts there identified the bee as belonging to the genus Nomada.

cuckoo

© Michael Q. Powell. All rights reserved.

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