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The seaside overlord lost his status and fell into the dirge of extinction because of the use of pesticides?

Time:2022-11-29 12:41:10 source:ucutxmastrees.com author:Beast Read:456次
The seaside overlord lost his status and fell into the dirge of extinction because of the use of pesticides?

The mighty seaside overlord, the prototype of the giant eagle on the Austrian coat of arms, is on the verge of extinction due to hunting and the use of pesticides If there is anything resembling a shelf flying in the sky above Greenland or Central Europe, it is a white-tailed sea eagle Preying. Its white tail blends perfectly with the sky, making it impossible to tell apart, and its broad wings spread almost 2.5 meters wide, making it look like a giant board. Although it flies like a giant board, it is not clumsy. The white-tailed sea eagle is a large bird of prey in terms of size, but it is an extremely agile hunter.

Aerial diving

The main hunting strategy of the white-tailed sea eagle is to dive down from the air, then spread its claws, suddenly grab fish and waterfowl on the surface and kill them. As birds of prey living by the sea, white-tailed sea eagles sometimes rush into the water to catch fish. White-tailed sea eagles are not interested in small fish. In order to fill their stomachs, the fish caught by white-tailed sea eagles generally weigh more than 2 kilograms. After capturing the prey, the white-tailed sea eagle holds the fish tightly, then spreads its wings and stays on the water for a period of time, in order to wait for the prey to become exhausted, and the struggling prey will interfere with their flight. When the prey struggles to the point of lack of strength, they fly back to land to enjoy a delicious meal with the prey. Like most raptors in the genus of sea eagles, in addition to actively attacking their prey, white-tailed sea eagles also adopt a survival strategy of standing still, which can help them conserve energy to a great extent. In the process of waiting for the prey to be hooked, the white-tailed sea eagle will also stand in the tree on the shore and wait for the best time, which often lasts for several hours.

Seabird Killers

The main food of white-tailed sea eagles is fish, in addition to which they will catch some seabirds. Since most seabirds are large, they want to catch robust seabirds There are some difficulties for them. Most of the time, the huge sea eagles are spotted by seabirds before they can attack, and when they are not close to the seabirds, the prey will flee in all directions, and finally the white-tailed sea eagles can only give up the chase. Some sick or weak seabirds are the best targets for white-tailed sea eagles to capture, and these weak seabirds often become the plate of white-tailed sea eagles. In order to avoid white-tailed sea eagles, many local seabirds adopt different survival strategies. For example, coots, which dive to escape the claws of white-tailed sea eagles. As soon as they appeared on the surface, the Whitetails bent down again, and the coots had to dive right into the water. Smart white-tailed sea eagles take turns hunting in response to the coot's survival strategy. The coots use up a part of their physical strength every time they dive, and over time, the coots will be exhausted, and they will not be able to escape the claws of the white-tailed sea eagle. Sometimes white-tailed sea eagles also catch herons and wild geese in flight. Although white-tailed sea eagles sometimes look clumsy, they are also sensitive fliers and hunters. As long as the timing is right, any bird can have it. Might be their meal. White-tailed eagles are large birds of prey, and with their size advantage, white-tailed eagles sometimes try to attack other raptors, such as ospreys.

Sacred Symbol

As a large bird of prey, the white-tailed sea eagle often appears in a solemn image in human culture, and in many regions they have become a symbol of strength. In human culture, the eagle was the messenger of God in classical times and represented the state order in the Middle Ages. The white-tailed sea eagle is the largest eagle in Europe and is generally printed on various signs as a symbol. Even the eagle on the coat of arms of Austria and Great Britain, like countless others, is based on the white-tailed sea eagle. Whether ancient or modern, in the core system of human culture, there has always been a sense of worship for birds of prey.

Endangered

Although large raptors are highly worshipped in the traditional human cultural system, the current living conditions of white-tailed sea eagles are as bad as other eagles. Like many birds of prey, white-tailed sea eagles were hunted in large numbers by hunters until the mid-20th century. From 1900 to 1966, 22,137 white-tailed sea eagles were hunted in Norway alone for the "eagle shooting award", and an average of more than 300 white-tailed sea eagles are shot by humans every year in the Gulf region. Human hunting has destroyed local white-tailed sea eagle populations, making it difficult for their numbers to recover. Human hunting is only one of the reasons for the decline in the number of sea eagles, and pesticides have a great impact on sea eagles. The amount of the pesticide DDT in the fat tissue of many animals is increasing, and because the white-tailed sea eagle is at the top of the food chain, the pesticide is finally concentrated in its body. DDT caused the white-tailed sea eagles' eggshells to become thinner and thinner, and many of the eggs were fractured during hatching. In this way, the white-tailed sea eagle, which has been greatly reduced, is on the verge of extinction.

Summary

More and more countries have begun to protect white-tailed sea eagles. European countries have done a good job in this regard. Many European countries have banned the use of DDT, and hunting white-tailed sea eagles locally is no longer Legally, it is by relying on such policies that the survival of the white-tailed sea eagle can continue. In the early 20th century, white-tailed sea eagles were almost extinct in Europe. After some countries protected sea eagles, ornithologists found that white-tailed sea eagles began to appear in Western Europe.

(责任编辑:Birds)

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