Saved Australia s butterflies to read the answers

3.Analyze in your own words why night butterflies can control the devastating disasters of cacti?

Because it only feeds on cacti and has a great appetite.

Revelations:1On the natural stage, each creature has its own role. You can't look at every creature.

2.It is necessary to take care of natural creatures, understand the laws of nature, and protect the ecological balance.

3.Protecting the ecological environment is everyone's responsibility.

Main content: It turns out that the soil in Australia is very fertile, and the cactus that cannot grow in the United States is extremely suitable for Australia.

These cacti began to spread and multiply at an alarming rate, and several cacti soon turned into noisy jungles with "thorns". No matter how much people cut with knives, burned with fire, or uprooted, it was useless.

Just when people were helpless, a scholar found a night butterfly that fed on cacti at night and had a great appetite, so the scholar raised more than 1,000 butterflies and released them. Eventually, more than 30 million hectares of land were again converted into fertile farmland.

It turns out that the soil in Australia is very fertile, and cacti, which cannot be grown in the United States, are extremely suitable for Australia. These cacti began to spread and multiply at an alarming rate, and several cacti soon turned into jungles with "thorns". No matter how much people cut with knives, burned with fire, or uprooted, it was useless.

Just when people were helpless, a scholar found that night butterflies that were active in Yeyuanchang and fed on cacti and had a great appetite, so the scholar raised more than 1,000 butterflies and released them. Eventually, more than 30 million hectares of land were transformed into fertile farmland.

This story tells us that on the stage of nature, every creature has its own role. We can't underestimate every living thing, we must understand the laws of nature, and only then can we do good things.

Queensland, Australia, has a butterfly sculpture monument and a butterfly memorial. This is because the locals consider a species of night butterfly to be the "savior of Australia" and built it for it.

In 1860, the Australian state of Queensland introduced two species of cacti from the United States and Mexico, and people wanted to use it as a green fence around the pasture. But I never imagined that as soon as the extremely vigorous cactus encountered the extremely suitable temperature and fertile soil of Australia, it would multiply and spread at an alarming rate, and it would not take long for a few cacti to become a large "thorny jungle". In just 20 years, more than 30 million hectares of land have been occupied by these thorny plants, and at an astonishing rate of 500,000 hectares per year, it has expanded outward, turning vast tracts of fertile land into wilderness useless for livestock and agriculture.

A special committee was formed in the local ** for a large-scale struggle against cacti. People cut with knives, burned with fire, and uprooted, but with little effect. Before the old ones were gone, new ones grew again.

After exhausting all methods, the troubled people turned their attention to insects that exclusively eat cacti. An entomologist discovered that Argentina has a butterfly that specializes in nocturnal activities, its wings are about 4 centimeters long, grayish-brown, it feeds only on cacti, and it has a large appetite. So he brought thousands of these night butterfly eggs back to Australia to breed and stock.

Sure enough, the night butterflies became effective cactus nemesis, and everywhere they went, patches of cacti were devoured and destroyed. By 1935, 30 million hectares of land had been restored to fertile farmland and pasture.

For example, cacti can still be found in Australia today, but night butterflies never give them a chance to reproduce in large numbers. Although this night butterfly is not as beautiful as other butterflies, it is far less colorful and endearing, but people are grateful to it, and have reverence and gratitude. As you know, it was these humble night butterflies that saved the Australian continent from the devastating disaster of cacti in the early 20th century.

Butterflies have a very short lifespan.

OE is born when it is time, but E talks about Feng Fangdudu.

"Saved Australia's Butterfly".

Tell us that on the stage of nature, every creature has its own role. We can't underestimate every living thing, we must understand the laws of nature and ecological balance, in order to do good deeds.

I have learned that we must take care of natural creatures and understand the laws of nature to protect the ecological balance.

Protecting the ecological environment is the responsibility of each of us, and we cannot give up every little creature, because the meaning of every life is huge.