For earthly organisms, both the overall population and the number can be said to be significantly reduced. The main reasons should be known to everyone, that is, habitat shrinkage, natural resource exploitation, climate change, pollution and other issues threaten their survival. And as humans realize the importance of the Earth's ecosystem, plans to plant trees and protect scarce creatures are constantly emerging, so occasionally we will usher in some good news, that is, the reappearance of long-disappeared creatures.
For example, the silver-backed shrew deer disappeared 30 years ago and was discovered, the "apaporis crocodile" that disappeared for 66 years reappeared, and the white-throated buzzard (dryolimnas cuvieri), a land bird that became extinct 136,000 years ago, reappeared. Of course, this answer cannot be given for the time being, after all, scientists do not know where these creatures were before, and now they suddenly appear or are still relatively "ignorant" and do not know the reasons.
According to the Independent, in 2020, the United Kingdom appeared a "bird of prey" that disappeared for a hundred years - "white-tailed eagle" or "white-tailed eagle king", and the reason why it is called "white-tailed eagle king" is mainly because it is the largest bird of prey belonging to the British region. According to scientific records, the bird of prey has been suspected of extinction in The United Kingdom since its last appearance on the Isle of Wight in 1780, and now it has disappeared for 240 years, which can be said to be a surprise in British nature. The bird of prey was once common in the southern part of England until it was wiped out by illegal killing in the 18th century, so it was considered extinct.
According to the Royal Society for the Protection of Birds (RSPB), when the "White-tailed Eagle King" was affected, the European seahawk population also suffered severe persecution, which led to the overall number of organisms in some countries being reduced, so this also reminds us once again of the importance of protecting organisms, when these organisms are returning or appearing, indicating that they are more suitable for the local ecological environment, including the "White-tailed Eagle King" declared extinct in the United Kingdom, otherwise there will be no return. Of course, according to the report, the reason for the reappearance of the United Kingdom is a little different from the reasons mentioned above, that is, it was introduced into the wild, so it is not the emergence of extinct organisms in the United Kingdom again, which is the reason, which is explained.
We also briefly said above that the "White-tailed Eagle King" belongs to a large bird of prey, and the wingspan of the creature is as high as 2.5 meters when flying, which can be said to be relatively rare in the biological world, and its living area is generally at an altitude of 2500-5300 meters. The "feeding habits" of the creature are relatively messy, mainly feeding on fish, and will also eat rodents, wild ducks and so on when there is time, which shows that its ferocity is still large. Of course, it may also be because of its appearance, so it is so easy to attract the attention of poachers.
However, although the creature is considered extinct in the United Kingdom, it is listed as endangered in the IUCN Red List of Threatened Species, although there are times to see reports that it is not endangered, and there is no definitive answer for the time being. So the overall number may still be quite a lot. However, the white-tailed eagle has 2 subspecies, so there are also related species in China, which belong to the national first-level protected animals. When you see the creature, you must protect it well, so that there will be more and more biodiversity, of course, the average person may see this creature may also be far away, it may look a little large.
Simply put, biodiversity is an integral part of maintaining the ecological balance of the earth, so without these organisms, our planet may be "out of balance". That's why the United Nations is constantly calling for the importance of protecting living things, because it's not just about the growth of plants and animals, it's about human beings. Since the industrial age, human changes to the earth can be said to have been "unrecognizable", of which 75% of the land and 66% of the marine ecosystem have been changed, and now it is still continuing, it is clear that the future of the earth's exploitation will be everywhere.
Some people may say that if there is no development, then human beings can not move forward, it is true that this is "two-way", but it can be clearly said that if we use it in moderation, perhaps the earth will not have a certain impact on living things because of destruction, mainly after destruction, we do not have a maintenance measure, so it is difficult to "restore" again after finally leading to more destruction, we do not say complete "recovery", it is good to be close. But humans can't do it.
So back to the above topic, the United Kingdom has seen the return of the "White-tailed Eagle King" for the first time after 240 years, so it is necessary to observe it well and not lose it again. Let it develop slowly and consolidate the stability of the ecological environment.