What can crickets tell you about the weather?
Wednesday, June 12, 2024
Make every day more interesting. Each day a surprising fact opens a world of fascinating information for you to explore. Did you know that….? 
| Original photo by Verry R. Wibawa 09/ Shutterstock |
| Crickets change the speed of their chirping according to the temperature. | Physicist Amos E. Dolbear is known for his work on early telephones and other inventions, but an 1897 issue of The American Naturalist contained a different type of scientific contribution: the hypothesis that cricket chirps are linked to air temperature. Dolbear's observations (likely of snowy tree crickets, or Oecanthus fultoni) led him to theorize that the frequency of their chirps increased with warmer weather, and slowed as the thermometer fell. Surely, the phenomenon could be used to "easily compute the temperature when the number of chirps per minute is known," Dolbear wrote. Most entomologists now agree that his theory — called Dolbear's law — is pretty spot-on, thanks to how insects respond to environmental changes. As cold-blooded creatures, crickets are unable to regulate their body temperatures internally, relying on the sun's heat to fuel their metabolisms and provide the energy they need. Warmer temperatures let the six-legged critters use more energy, allowing more of the chemical reactions in their bodies that produce muscle contractions (and thus chirps) to occur — which we hear in the form of faster-paced songs.
You can easily test Dolbear's law on the next warm, buzzing night. Tune in to one cricket's song, count the number of chirps you hear in 15 seconds, and add 37 for an approximate forecast in degrees Fahrenheit. (If math isn't your strong suit, the U.S. National Weather Service has a handy cricket chirp converter that also provides a Celsius conversion.) There are some limitations to using a cricket temperature gauge, however: Most crickets won't sing when temps dip below 55 degrees or when heat pushes the thermometer past 100. And while many crickets respond to temperature shifts this way, not all chirp at the same rate. Fortunately, the snowy tree cricket is widespread throughout the United States — where, perhaps unsurprisingly, it's also known as the thermometer cricket.
|
|
 | | The earliest known insects couldn't hear. | | |
|
|
| The earliest known insects couldn't hear. |  |  |
|
|
|
|
|
| The Best Hearing Aid in 2024: "The Clarity Is Unbelievable" | | Imagine this: You're in a crowded restaurant. You're with friends, family, colleagues — take your pick — and there's music playing and people all around, so it's not easy to hear the conversation. What do you do? Here are your options: You can lean in, read lips, ask for repeats, or… you could give this tiny new hearing aid a try. hear.com's new bestselling device is making conversation effortless, even in background noise — and the clarity is unbelievable. Join 350,000 happy customers and give it a try. |
|
|
|
| Most crickets are __, meaning they become most active at twilight. |  |
|
|
 | Numbers Don't Lie |
|
 | | Rough number of known true cricket species around the globe | | 900 |
|
| | | Volume (in decibels) of the loudest cricket chirp | | 115 |
|
|
|
| | Distance (in miles) Mormon crickets can walk in search of food per season | | 50 |
|
| | | Year Jiminy Cricket debuted in Disney's animated "Pinocchio" | | 1940 |
|
|
|
|
|
 | Some crickets can't chirp. |
|
| Another snag when forecasting á la insect: Depending on where you live, local crickets may chirp less frequently or not at all, due to evolutionary changes that keep them out of harm's way. Thanks to their low placement on the food chain, crickets rely on tricks such as camouflage and lofty leaps to escape predators, but some species have also modified or muted their defining feature — chirps — as a survival technique. Jerusalem crickets hiss instead of chirping, while camel crickets lack the anatomy to make any sound at all. Oceanic field crickets found in Hawaii have quickly evolved over the past 20 years to stop chirping altogether, a new trick designed to evade parasitic flies attracted by their songs. And while the flying sword-tailed cricket of Panama does chirp, the species has learned to embrace silence, too — the crickets can hear ultrasonic bat calls, giving them enough warning to silently drop from midair flight to avoid capture. | | |
|
|
|
| Thank you for supporting our advertisers. They help keep Interesting Facts free! |
|
|
posted by June Lesley at 5:37 AM
0 Comments:
Post a Comment
<< Home