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.
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!
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:
|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]