Month: October 2012 (Page 2 of 5)

Bug of the Week: Banded Woolly Bear

It is so fun to travel to new places and meet new insects. Take, for example, the banded woolly bear, Pyrrharctia isabella.

We don’t have this species of caterpillar in the low deserts of Arizona (although we do have another type people call woolly-worms). Banded woolly bears like this one are found further north, where the winters are cold and snowy.

Banded woolly bear caterpillars eat a variety of plants, including grasses, certain trees, and wildflowers such as asters and sunflowers.

In the fall when they are finished eating, banded woolly bears crawl here and there in search of a protected place to overwinter. That’s when most people see them.

If you try to pick one up, it will curl up into a ball and remain still. After a short time, it will uncurl and crawl away.

Do you know what the caterpillar turns into? In the spring, after spinning a cocoon and pupating, the banded woolly bear becomes a yellowish Isabella moth.  (See more photographs of the Isabella moth).

Scientists have been studying how the caterpillars and their relatives manage to survive under freezing conditions. In one extreme case, another woolly bear from the Arctic lives for many years by feeding briefly in the summers and then freezing up – for as many as fourteen or more years in a row – before becoming an adult.

Discovery Channel has shared an amazing video from Frozen Planet. Note:  The video shows a close-up shot of caterpillars freezing and thawing with dramatic music, which may be disturbing to certain sensitive children. Also, a second video comes up that takes about the filming.

Young readers might enjoy Oh No, Woolly Bear!, a Lift the Flap Book by Patricia McFadden and illustrated by Michéle Coxon.


Disclosures: The book was from our local library. Also, I am an affiliate for Amazon. If you click through the linked titles or ads and make a purchase, I will receive a small commission at no extra charge to you. Proceeds will be used to maintain this self-hosted blog.

Mystery Seed of the Week 133

Last week I did some traveling and managed to take some photographs of seeds and plants found throughout a larger region of North America. For the next few weeks I will be featuring some plants that are not necessarily found in Arizona.

This plant is a common roadside weed.

The seeds in close up.

Do you know what plant they come from? Bonus points for identifying the butterfly 🙂

The answers will be posted next Tuesday.

Seed of the Week: Tomatillo

Our mystery seeds from last week were from a tomatillo or Mexican groundcherry, Physalis philadelphica.

Perhaps this photograph by Jose Hernandez @ USDA-NRCS PLANTS Database would have been easier to identify?

The fruit of the tomatillo is unusual because it is covered by a papery calyx.

The fruit on the left is how it looks on the plant, the fruit on the right has had the calyx removed.

Another unusual trait of the tomatillo is that the fruit is sticky once the calyx is removed. The stickiness is easy to remove by washing the fruit.

Other members of the genus Physalis, or groundcherries, also have papery husks over the fruit.

This one is a common weed.

The flowers have a similar shape.

In this video, you can see the plants growing in a garden. They are relatively easy to grow.

Tomatillos are often used in salsa, sauces and soups, like this green pozole (a similar recipe at Martha Stewart).

Have you ever grown tomatillos?

What is your favorite way to eat them?

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