Is Siu-En Love really dead fast? Flies: Thank you! It’s a little bit of a problem.

A fly couple fell on the ceiling in a cow shed full of manure. The two of them had just prepared for a romantic mating night, unaware that their intimate behavior had attracted an uninvited visitor, a nather rat’s ear bat lurking in the shadows. It seems that some perverts, after all, peeping at other people’s sex is not a good person, although the bat is just eavesdropping, but also very perverted.

Is Siu-En Love really dead fast? Flies: Thank you! It's a little bit of a problem.

Flies mating on the ceiling

Why should bats eavesdrop on the sound of a pair of flies, because it doesn’t want to miss a one-for-one dinner! Studies have shown that hungry bats judge their position and pounce quickly on flies based on the clickthey they make when they mate.

Bats that feed on sound

Bats have two ways to find prey, one passively listening to the sounds of their prey and the other actively echolocation. Most bats prefer echolocation as the primary tracking tool.

Is Siu-En Love really dead fast? Flies: Thank you! It's a little bit of a problem.

Nats rat-eared manta.source:Wikipedia

What is echolocation? Echolocation is when bats use the throat muscles to contract quickly to produce ultrasonic waves, which then pass through the mouth or nose, and the sound reflexes when it touches an object, meaning echoes, and bats use protruding ears to collect echoes of their prey. By sensing changes in the intensity, frequency, return time and direction of the echo, the bat’s central nerve can pinpoint the location of the prey.

But echolocation is not everything. If insects fall on those textured, uneven walls, such as cow sheds, it can cause problems for bats. The ultrasonic waves emitted by bats will reflect insects, and those small bumps from the walls will reflect, and more than one convex point, which is a number of convex points, so that the faint echo of the insect will be completely obscured by a large number of echoes in the background.

Over a four-year period (13 nights, the bats chose to observe at night because bats were inactive during the day), they photographed 8,986 flies that crawled on the barn, and found that bats never attacked the flies alone. It is clear that the echolocation of bats is not enough.

Is Siu-En Love really dead fast? Flies: Thank you! It's a little bit of a problem.

Bats prey on flies on walls

However, the scientists found that once two flies mate, their risk of being attacked by bats increases dramatically. Over the four-year study, a total of 1,105 flies mated, of which 59 were eaten, meaning that the probability of a fly mating in four years was 5.3 percent, compared with an average of 26 percent if replaced with an annual rate.

Is Siu-En Love really dead fast? Flies: Thank you! It's a little bit of a problem.

You won’t be eaten if you don’t mate, you’re going to be eaten if you mate.

The probability of a “lone fly” being eaten is zero, compared with a full 26 percent increase in the probability of mating being eaten, so it seems that mating is really easy to eat. And the flies that are eaten are usually paired, and they tend to double-kill in the face of attacks on bats, and scientists observe that only one of the mating flies escapes the bat attack.

Why is sex easily eaten?

As mentioned earlier, bats are positioned in two ways, one is passive listening, one is echolocation, it is clear that in the rough cowshed, echolocation is not enough. Then the only way bats judge the position of flies is to listen to the sounds they make.

Is Siu-En Love really dead fast? Flies: Thank you! It's a little bit of a problem.

Wave forms of sound made during mating

To determine that the idea was correct, the scientists first recorded the sound of a fly having sex. During mating, flies make a strange, intermittent, click-like click similar to a broken branch, most likely from a male wing vibration, at a frequency of 9-154KHz, a buzz that can be heard in the human ear.

Is Siu-En Love really dead fast? Flies: Thank you! It's a little bit of a problem.

A click

The scientists then installed a set of speakers in the cow shed. There are three sounds, one white noise (as a blank control), the sound of a fly crawling on the wall, and the sound of a sex. Bats attack the speakers when the sound of mating, or click, is played, but if it’s white noise or crawling, the bat ignores them.

And scientists have previously used the sound of flies flying, a buzz below 48kHz, to attract the attention of bats, but found that bats are not interested in the sound of flies flying. So it seems that bats really like to eat lovers…

Is Siu-En Love really dead fast? Flies: Thank you! It's a little bit of a problem.

Mating flies Picture: needpix

The study also showed that bats have strong learning skills. Although hungry bats can’t find flies through echolocation, they clearly know that the click of a fly when they mate means food, and it’s double-

The dilemma facing flies

Since the sound of a fly may be eaten while heyisted, can it be lowered?

Research by Lisa Meffert of Rice University in Houston, Texas, shows that clicking is part of the flies’ courtship behavior. When a male fly makes a courtship, it flaps its wings and clicks before it can mate with the female fly’s permission. That is, the fly’s mating occurs after the male clicks.

Is Siu-En Love really dead fast? Flies: Thank you! It's a little bit of a problem.

During the fly mating, the female is below and the male is above

Scientists speculate that females may use the sounds they make before mating to assess certain male abilities, such as reproductive abilities. So no matter what happens, be sure to look at each other’s conditions before mating takes place. If that’s the case, the click of the fly is a deadly foreplay…

So, if you lower your voice in order not to be eaten, it is possible to be used as a Luther by a female, and this ancestral chromosome cannot be passed down. Failure to make a sound is tantamount to no offspring, and the sound may be eaten, and the fly finally makes a heroic decision – to make a sound.

Perhaps this is the scientific basis of the legendary “Siuen loves to die fast”.