A Firefly's Twinkle Doubles as a Warning Sign to Predators

iStock
iStock

A group of fireflies twinkling on a summer's night may look peaceful, but those flashing lights can send an unsettling message: 'If you eat me, you'll regret it.' That's what a team of researchers discovered when conducting a study published in Science Advances.

According to the new research, reported by ScienceNews, a firefly's flashing behind acts as a warning signal to predators like big brown bats. Entomologists have long known that fireflies use their lights to attract mates, but the suspicion that they also use them to avoid becoming dinner wasn't confirmed until recently.

To investigate this theory, a team of scientists from Boise State University and other institutions exposed fireflies to three bats with no experience hunting the insects. Fireflies contain toxic chemicals that make them unappealing to predators. After tasting a few of the bugs and spitting them out, the bats learned to stop going after them altogether.

To see what part light played in these interactions, the researcher conducted a separate experiment. They attached tiny paper belts to each firefly and painted them with two coats of black paint—a process that took about 45 minutes for each specimen. The result was a cloak that effectively hid the fireflies' light show. When bats were set loose on the snuffed-out group, it took the predators about twice the amount of time to realize the fireflies were toxic and ignore them. With no visual warning signs to tip the bats off, the study authors suspect that the bats eventually learned to identify the insects from their flight patterns via echolocation.

Fireflies don't light up only when they see a bat swooping their way: Males each have their own "flash fingerprints" they use to attract mates, and females blink in response when they see a display they like. The new study suggests that predators' reaction to this bioluminescent adaptation may have influenced its evolution.

[h/t ScienceNews]

8 of Amazon's Bestselling Home Office Desks

JOISCOPE/Amazon
JOISCOPE/Amazon

If you've been working from home for the past six months (or longer), you're overdue for a high-quality office desk. And not just any old one, but a desk designed specifically for comfort and purpose, so you can organize everything you need for your 9-to-5 without having to worry about losing track of that important folder or planner.

The problem, though, is that there are so many options out there to choose from. That’s why we've stepped in to make the process a bit easier for you by compiling a list of the bestselling home office desks from Amazon. Check them out below.

1. Furinno Simplistic A-Frame Computer Desk; $237

Furinno/Amazon

This Furinno A-Frame desk is Amazon’s top home office desk at the moment. Though it may seem simple, sometimes that's all you need to make your space more efficient. The small desk hutch on top creates little cubbies for you to store papers, notebooks, or tools you may need throughout the day. There's even a bench on the bottom for you to put your feet up during the last few hours of the workday.

Buy it: Amazon

2. CubiCubi 40-inch Home Office Table; $95

CubiCubi/Amazon

For those looking for a sleek, modern desk that doesn't skimp on function, go for the CubiCubi. The metal frame, combined with the black wood surface, gives this table a sturdy, reliable feel. There's also a built-in side pocket to store all your papers out of eyesight but within arm’s reach. And according to the company, the whole thing should only take 10 minutes to assemble.

Buy it: Amazon

3. Coleshome 31-inch Computer Desk; $84

Coleshome/Amazon

This 31-inch desk from Coleshome is the perfect option for a small home office. Complete with adjustable leg pads for added stability, this desk can fit in any nook and is designed with simplicity in mind.

Buy it: Amazon

4. Mr. Ironstone Black L-Shaped Desk; $130

Mr. IRONSTONE/Amazon

This unique L-shaped desk is perfect for anyone looking to fit their workstation into the corner of a room. Measuring at 50.8 inches on both sides, you’ll get the most out of your surface by adding multiple monitors, a printer, and books all around.

Buy it: Amazon

5. Furinno Efficient Home Desk with Side Shelves; $53

Furinno/Amazon

If you want to make your office feel more like a study, then you’ll need somewhere to store all your tomes. This Furinno desk can help you make space to work and house all your favorite books nearby to grab whenever you need them. The multilevel shelves help make this desk feel more modern, while also creating plenty of storage space.

Buy it: Amazon

6. JOISCOPE 40-inch Computer Desk; $110

JOISCOPE/Amazon

This desk comes packed with plenty of storage space for your things while also providing a large, sleek worktop for you to spread out all day long. The oak finish on top also adds a bit of sophistication to your workday, even if you spend your lunch break perusing the latest cat memes.

Buy it: Amazon

7. Seville Classics Ergonomic Mobile Desk Cart; $44

Seville/Amazon

Standing desks have become more popular in recent years as people look for more ways to improve their posture and overall health. The Seville Ergonomic Mobile Desk can help you achieve your physical goals while assisting you with your work. The desk's height can be adjusted from 20.5 inches to 33 inches, and it has four swivel wheels, two of which lock in case you want to stay in one spot.

Buy it: Amazon

8. ComHoma Black Writing Computer Desk Office Folding Table; $100

ComHoma/Amazon

For a modern design, there's the ComHoma writing desk. The sleek metal bars on the sides and back of the desk add style, not clutter, and the 39-inch tabletop will give you ample space to work on whatever projects come your way.

Buy it: Amazon

This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links.

100 Fascinating Facts About Earth

The best Spaceball.
The best Spaceball.
NASA

Did you know that there’s a place in the South Pacific Ocean called Point Nemo that’s farther from land than any other point on Earth? So far, in fact, that the closest humans are usually astronauts aboard the International Space Station. (And by the way: The map you’re about to look for Point Nemo on might not be entirely accurate; a certain amount of distortion occurs when trying to depict a 3D planet on a 2D surface.)

In this all-new episode of The List Show, Mental Floss editor-in-chief Erin McCarthy is journeying to the center of the Earth, and visiting its oceans, its atmosphere, and even space, in search of 100 facts about our endlessly fascinating planet.

The subjects that fall under the umbrella of “facts about Earth” are nearly as expansive as Earth itself. Geology, biology, astronomy, and cartography, are all fair game—and those are just a few of the many -ologies, -onomies, and -ographies you’ll learn about below. 

Press play to find out more Earth-shattering facts, and subscribe to the Mental Floss YouTube channel for more fact-filled videos here.