Tag: Bug of the Week (Page 10 of 11)

Bug of the Week: Ant Cocoons

Any idea what these are? I’ll give you a hint, they are often found under rocks.

ant cocoons

They are ant cocoons. When people see ant cocoons, they often mistake them for ant eggs. The eggs are actually very small, shiny and white or light-colored. The cocoons are made of silk spun by the ant larvae themselves before they pupate. Ant cocoons are oval and a light brown or beige color.

Children are always interested to learn that the black dot at the end of each cocoon is called a meconium. The larval ants can not get rid of their body wastes because their digestive systems do not pass all the way through to the outside. When the larva pupates within the cocoon, it is finally able to pass the wastes, which form that black dot.

Check out this previous post for more questions children have about ants.

Bug of the Week: Seed Bug

This morning it was a bit difficult to find a bug for bug of the week. Can you guess why from this picture?

raindrops

Woo, woo, it is raining here. Rain is a novel event, and all the insects apparently have sought shelter. I knew where to look, however, to find an insect that would be still out. There is always something happening on the desert milkweed, and this morning was no exception. Here is our bug this week, captured quickly before it started to rain again.

milkweed bug

The bright red bug shown is commonly called a seed bug (Oncopeltus sanguiniolentus). It may resemble the boxelder bug found in other parts of the country, but it lacks the black bars on the red section (top) of its wings.This species has one white dot in the black part (bottom) of its wings. Another species that has the black bars in the red, but has two white dots in the black is the small milkweed bug, Lygaeus kalmii. (See photo in newer post). To paraphrase Dr. Seuss, “what a very lot of bugs there are!”

It is amazing that there are so many insects feeding on the desert milkweed. The sap of milkweeds contains both rubbery latex and poisons. Insects like queen and monarch caterpillars, yellow oleander aphids and these milkweed bugs have ways to deal with it. In this case the bugs avoid the latex-carrying channels with their straw-like mouthparts.

If there aren’t any milkweeds available, these versatile bugs also feed on the seeds of various plants.

Bug of the Week: Northern Arizona Ladybugs

We were able to travel to Prescott, Arizona last weekend. Not only was it cool, but we got some rain in the night. Early the next morning the plants and insects both were wet. We saw a lot of interesting wildlife, and I actually overwhelmed my poor camera at one point.

ladybug with raindrop

This is a native ladybug or lady beetle known as the convergent lady beetle, because of the white lines on the thorax that slant towards the center (although I guess from another point of view it could be the divergent lady beetle). It carried a rain drop for quite a ways.

harmonia lady beetle

On the same plant, a few branches away, was a larger lady beetle with a rough “M” on it’s thorax. This is the introduced multicolored Asian lady beetle. The Asian lady beetle is the one that comes into houses in the fall to spend the winter indoors. The convergent lady beetles also cluster together, but usually choose outdoor locations. This beetle had smaller droplets of water.

In the same location, we also saw some white-lined sphinx moths flitting from flower to flower, like insect hummingbirds. I hope to get some pictures of their large yellow or green and black-striped caterpillars which are probably feeding on desert weeds about this time of year. If you scroll down the page at Caterpillars of Southeastern Arizona you will see a picture of one. Click on the word adult for a photo of the moth.

When they have finished eating and are looking for a place to pupate in the soil, these caterpillars can migrate in large numbers. To people who don’t know what they are or haven’t seen them before, it can be quite alarming. As with many insects. however, it doesn’t take them long to find a good place to dig into the soil and they will disappear.

Books for more information on ladybugs:

For young children try “Are You a Ladybug?” Like the rest of this series, the book compares humans and ladybugs in an informative and gently humorous way.

Although the title of this First Discovery Book is “The Ladybug and Other Insects,” it really is mostly about ladybugs. Some of the pages are clear with illustrations on them. When flipped they show things like the underside of the ladybug. These books in this series are great fun, and my son still enjoys flipping through them even though he is well past the targeted age range.

This is a newer version of the same book in paperback.

“Face to Face With the Ladybug” is a bit more detailed and is for the older child.

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