Fun Fact Friday: Hiding in Plain Sight

As my favorite dining hall employee says every Friday, “We made it!” Yes we did, and as a reward for surviving the work week, here’s your Friday fun fact from Arthur V. Evans’s new book Beetles of Eastern North America.

Beetles face a plethora of predators everyday from birds, bats, and rodents to spiders, ants, and even other beetles. In response to the constant threat of being attacked, swooped up in the air, eaten, or all of the above, beetles have developed various ways to protect themselves. The avocado weevil, Heilipus apiatus (Curculionidae), besides having an awesome name, also has a unique way of “hiding” from predators: Bird dropping mimic. These beetles, “which look very much like a bird dropping, are of no interest to predators.” Likewise, “the small, dark, and chunky warty leaf beetles Chlamisus, Exema, and Neochlamisus (Chrysomelidae) hide right out in the open and are often overlooked by predator and collector alike because of their strong resemblance to caterpillar feces.” (Evans 28)

Beetles of Eastern North America, Pg. 28

beetle 2

Pg. 28

 

Hope you enjoyed this weeks Fun Fact Friday from Beetles of Eastern North America and have a great weekend!


 

Arthur V. Evans is the author of:

Evans_Beetles Beetles of Eastern North America by Arthur V. Evans
Paperback | 2014 | $35.00 / £24.95 | ISBN: 9780691133041 | 560 pp. | 8 x 10 | 1,500+ color illus. 31 line illus. | eBook | ISBN: 9781400851829 | Reviews  Table of Contents  Preface[PDF]  Sample Entry[PDF]

 

Fun Fact Friday: All’s Fair in Love and Chemical Warfare

Happy Friday, folks! This week’s fun fact from Arthur V. Evans’s Beetles of Eastern North America explores the astounding chemical defenses employed by Coleoptera against their enemies.

Galerita_small

This colorful little insect is called Galerita bicolor. It spends most of its life hiding under tree bark, but if it’s disturbed, it sprays a noxious stream of formic acid out of its rear-end. Yikes!

bombardier_small

And this little guy’s got an even nastier trick up his sleeve. The Narrow-necked Little Bombardier Beetle (Brachinus tenuicollis) releases a boiling mixture of hydrogen peroxide gas, hydroquines, and various enzymes. The cocktail makes an audible popping sound as it exits the insect, and can be sprayed at a predator with great accuracy. An aptly named bug if there ever was one!

Other beetles, such as lady and blister beetles, are even able to make themselves bleed in order to protect themselves. This behavior, called reflex bleeding, occurs when the startled insect exudes bright yellow or orange hemolymph (beetle blood) from the joints of their legs. The hemolymph is laced with toxic chemicals, making them unappetizing to predators.

We hope you’ve enjoyed this installment of Fun Fact Friday, and learned one of nature’s most important lessons: think before you touch!


 

Arthur V. Evans is the author of:

Evans_Beetles Beetles of Eastern North America by Arthur V. Evans
Paperback | 2014 | $35.00 / £24.95 | ISBN: 9780691133041 | 560 pp. | 8 x 10 | 1,500+ color illus. 31 line illus. | eBook | ISBN: 9781400851829 | Reviews  Table of Contents  Preface [PDF]  Sample Entry [PDF]