Category: Bug of the Week (Page 197 of 218)

Bug of the Week: Z the Fruit Fly

Ever wondered where something like “Bug of the Week” might lead? Sure it is fun, but can anything really useful come out of checking the insects in your back yard once a week? It turns out some very cool things can result from regular bug watching.

A few weeks ago when I was looking at the fruit flies in my yard, I found something I didn’t recognize. I sent it to a friend of mine at the University of Arizona to identify.
Take a look:

zaprionus fruit fly
When I looked through my camera lens I saw this fruit fly with incredible white stripes that almost glow florescent, they are so bright.

My friend identified it as Zaprionus indianus, a fruit fly native to Africa, the Middle East, southern Europe and southern Asia.  This species was first found in the Americas in 1998 when it was reported from São Paulo, Brazil. It just arrived in Arizona within the last year or so. I call it “Z” because of the genus name and its fancy zebra stripes.

zaprionus fruit fly

Here is a photo of Z under a powerful microscope:

zaprionus fruit fly

I’ll be keeping a good eye on Z to find out what it likes to eat and how many are around. Right now it hangs out with the other fruit flies in the compost heap.

You never know when you might meet some new insect neighbors, if you just go out and look.

Bug of the Week: Another Lacewing Larva

Lacewings are pretty common in Arizona and I found another lacewing larva last week. (Check previous posts about the life cycle of lacewings).

lacewing larva

This lacewing was walking on the silk cocoon of a moth. You can just see the outline of the pale green moth pupa under the white strands of silk of the cocoon. I think the lacewing larva was trying to get inside, without much luck.

lacewing larva

See its long jaws? I think it might be the larva of a brown lacewing, rather than a green lacewing, because it looks a bit different. The brown lacewing adult has brown wings, hence the name.  They aren’t as fragile-looking as the green lacewing and we tend to find them more often in the colder months.

Bug of the Week: Webspinners

I found an unusual insect this morning. Here is a peek:

webspinner male

This is a webspinner. It may look a little like a termite reproductive (or swarmer), but I can tell it is not because it has bulges on its front legs. Those bulges contain special glands that make silk. Webspinners are the only insects that make silk with their legs!

webspinner male

This is a male webspinner. It is a male because it has wings and because it was out and about, not hidden. Females lack wings and hide under layers of silk laid under stones, piles of leaves or on bark of trees. I have only seen a female a few times.

webspinner male

Webspinners (Order Embioptera) are small, shy and are completely harmless. Not much is known about them because they are reclusive. Webspinners have two appendages at the rear, and some people think they may be related to earwigs, our bug of the week last week.

I was able to find a bit of video about a tropical species on YouTube. Unfortunately the embed function is denied, so try this link or type this text into search to find the video. Silk tents of the Web Spinner insect – Attenborough Life in the Undergrowth

The YouTube video is a small part from the Life in the Undergrowth movie, starring David Attenborough, available on DVD.

Let me know if you’d like to learn more about fascinating webspinners.

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