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Bug of the Week: Queen Caterpillars Feeding

We’ve featured queen butterfly caterpillars before, but each time we observe them, we learn something new.

How many caterpillars do you see on this young rush milkweed plant? Where are they on the plant and what are they doing?

We’ve noticed queen caterpillars often feed on the unopened flower buds. Those are the parts that disappear first.

This photograph has a few extra features. Let’s look more closely.

What’s that shiny white bump at the base of the bud on the top of the stem?

That is a hatched queen butterfly egg. Bonus points if you can find the shed exoskeleton from a previous molt.

The caterpillar in the lower middle of the first photograph of this post has finished off the flower buds. What does it have to eat?

What is the caterpillar doing?

It is crawling out to the tip of what serves as leaves on a rush milkweed.

Now it begins to eat. Any guesses why it might start at the tip?

It doesn’t take long. By the time I’ve taken a few more photographs, the “leaf” is gone.

If you’d like to see the rest of the life cycle, try the queen butterfly emerges post.

Bug of the Week: Cecropia Moth Cocoon

Sacs like this appear in autumn. We found this one on a piece of firewood.

What is it?

It’s a cocoon. The opening you see at one end reveals the cocoon is empty.

 

Public domain image from Wikimedia.

If we had been there at the right time, we might have seen one of these beautiful cecropia moths emerge. Wow!

Processional Termites Defy Expectations

Sometimes insects don’t look and act the way you’d expect.

subteranean-termite-tube

Take termites. Here in the Southwest, subterranean termites are common, but you don’t see them very often. They are tiny insects that spend most of their time hidden inside tunnels in wood or within the mud tubes they build.

The workers are soft and white, like a cooked piece of rice. The soldiers are heftier, with large mandibles and longer yellowish-brown heads.

Still, you don’t see them unless you break into their homes.

We also have desert encrusting termites, which make patches of mud over the surface of grass or the bark of trees.

They are also white and soft bodied, and stay out of sight.

In fact, you might think that all termites are like this if you only saw southwestern ones.

So, let’s move to Malaysia for a minute. What are the insects in this video?


(Thanks to Steve Naranjo for the video.)

The insects are actively running on a log. They are colorful. In fact, at first they look like ants, but these are processional termites. Rather than munching inside or on wood, they graze on lichens that grow on trees. If you look closely, you can see some of the workers carrying clumps of lichen in their mandibles.

Talk about defying expectations. Aren’t processional termites mind-blowing?

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