Category: beetles (Page 7 of 13)

Bug of the Week: Dung Beetles

Dung beetles have a rather odd lifestyle, but nonetheless they are fascinating for a number of reasons.

dungbeetle-X2(Public domain photograph by Alex Wild)

  1. Dung beetles help recycle dung by feeding on it.
  2. Dung beetles either roll the dung or bury it to prevent it from drying out.
  3. Dung beetles navigate to and from their burrows by the position of the sun and some can even navigate by recognizing the Milky Way at night.
  4. Female dung beetles, or sometimes both parents, may stay with their offspring after the eggs hatch and take care of them, something that is unusual with insects.
  5. Although most often seen on the ground, the adult beetles are actually strong fliers.

We’ll learn more about one of the first people to dung beetles for STEM Friday this week.

Bug of the Week: A Different Lady Beetle Larva

This week let’s take another look at the diverse community of insects found on the rush or desert milkweed.

Dusky Lady Beetle Larva with Aphids(Photograph by Lynne S., used with permission)

What do you see here? Probably the first things you notice are the bright orange-yellow aphids. Those are oleander aphids.

Dusky Lady Beetle Larva with Aphids on Milkweed(Photograph by Lynne S., used with permission)

But, what is the insect with the bright white fluffy look?

The insect that looks like a tiny white carpet is actually a lady beetle larva. Instead of the bright red-and-black lady beetles we usually think of, this larva will turn into a small dark brown or black beetle.

These nondescript beetles belong to a group called dusky lady beetles (Tribe Scymnini). The adults are round in shape, like other lady beetles, and feed on aphids, scales and mealybugs, too. The main difference is that the larvae produce a white waxy coating, which is thought to help protect them from predators.

Have you ever spot an adult dusky lady beetle or a larva? Where did you find it?

Fabulous New Children’s Book: Beetle Busters

The trees of eastern North America have been having it tough in the last century or so. First the American chestnut was wiped out by the chestnut blight fungus. Then the American elms were killed by Dutch elm disease, which is carried by a tiny beetle. Many forests were ravaged by an outbreak of gypsy moths in the 1980s. More recently ash trees are being killed by the emerald ash borer. In a new middle grade nonfiction book, Beetle Busters: A Rogue Insect and the People Who Track It  (Scientists in the Field Series) by Loree Griffin Burns and illustrated by Ellen Harasimowicz, we learn about another insect that is attacking hardwood trees:  the Asian longhorned beetle.

The North American infestation of Asian longhorned beetles, Anoplophora glabripennis, was first noticed in 1996 in New York City. Because the beetles don’t move far from their emergence site, officials decided the best policy is to destroy all infested trees by cutting them down and chipping them in an effort to eradicate the insects.

Eradication, or complete removal of an organism from an area where it is unlikely to re-occur, has been used with mixed success against insects (see for example, Eradication and Pest Management, Annual Review of Entomology, Vol. 43: 471-491, 1998). In her Author’s Note, Loree Griffin Burns admits that she questioned whether attempting to eradicate the beetles from her community in Massachusetts by cutting down and chipping many trees was going to be a successful tactic. In an effort to find out more, she gathered the materials that would eventually become the book.

 

Anoplophora_glabripennis1(Public domain image of Asian Longhorn Beetle by James Appleby, University of Illinois)

Beetle Busters contains information about the life cycle of the beetle, the history of its introduction to North America, details about how scientists are studying the insects, and a in-depth explanation how concerned citizens can get involved. Burns also reveals some information about how cutting down trees changes habitats and some evidence that ecosystems can recover eventually through succession.

This book is another wonderful addition to the award-winning Scientists in the Field series. Although written at the middle grade level, it will be a valuable resource for older readers, as well. If you live in eastern North America and are interested in nature and science, and particularly in trees, this book a must read.

Related:

The USDA has a website with information and links for reporting sightings of the beetles (http://asianlonghornedbeetle.com/) with a link to a page of useful resources for educators.

Age Range: 10 – 14 years
Grade Level: 5 – 9
Series: Scientists in the Field Series
Hardcover: 64 pages
Publisher: HMH Books for Young Readers; 1st Edition, 1st Printing edition (October 7, 2014)
ISBN-10: 0547792670
ISBN-13: 978-0547792675

Disclosures: This books was provided by the publisher for review purposes. I am an affiliate for Amazon, and 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.

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