Many places in China welcome migratory birds! Why do migratory birds migrate? What are the migration

Migratory bird migration is an instinctive behavior of birds. An adaptive behavior of birds to periodic changes in environmental factors. The migration routes are also different.

The migration of migratory birds is an instinct, an adaptive behavior of birds to the periodic changes of environmental factors. Seasonal changes in climate are the main reason for migratory birds.

During the winter, it transits through China from the East Asian-Australasian Migration Route, the West Asian-East African Migration Route, the Western Pacific Migration Route, and the Central Asian Migration Route.

The three major migration routes of migratory birds in China are as follows:

1. Western migratory bird migration area.

It includes summer migratory birds, such as bar-headed geese and fishing gulls, that breed in the arid or desert, semi-desert steppe areas and plateau meadow grasslands in the arid steppe of western Inner Mongolia, Gansu, Qinghai, Ningxia and other places.

2. Central migratory bird migration area.

Migratory birds, including the grasslands of eastern and central Inner Mongolia, the western part of North China and Shaanxi, can cross the Qinling Mountains and the Daba Mountains along the Taihang Mountains and Luliang Mountains into the Sichuan Basin in winter, or winter through the eastern part of Daba Mountain to central China and further south.

3. Eastern migratory bird migration area.

Including migratory birds that breed terrestrial in Northeast China and eastern North China, such as mandarin ducks and Chinese mergansers. They may migrate south along the coast to Central or South China or even Southeast Asia; Or from the coast directly to Japan, Malaysia, the Philippines and Australia and other countries to spend the winter.

Migratory birds

Many birds migrate seasonally along latitudes, breeding in temperate regions at higher latitudes in the summer and wintering in the lower tropics. In late summer and early autumn, these birds migrate south from their breeding grounds to their winter grounds, and from their winter grounds north to their breeding grounds in spring. These birds, which migrate north and south with the changing seasons, are called migratory birds.

When it flies to a certain area to nest and settle down in spring and summer, it is late autumn, and its attendants fly to the warmer areas in the south to spend the winter, and then fly to this area to breed in the spring of the following year, this kind of bird is called summer migratory birds. Winter migratory birds refer to wintering in a certain area in winter, flying to the north to breed in the spring of the following year, and when the young birds grow up, it is late autumn, and they fly to the original area for wintering, this kind of bird is called winter migratory birds.

1. Routes: Every year, billions of migratory birds around the world migrate across continents. The eastern route of migratory birds traveled south along the coastline of the Eurasian continent, and the western migratory birds crossed the Qinghai-Tibet Plateau and the Sichuan Basin to enter the South Asian subcontinent and the former Hongyun-Guizhou Plateau for wintering.

Affected by geographical conditions, migratory birds in central China fly horizontally along the river basin when they fly through the Yangtze River and the Yellow River in China.

2. Introduction: Bird migration is a survival instinct response of birds following the natural environment, study the migration behavior of birds, understand the migration time and route of migratory birds, the number of migrations, population relations, homing ability and the relationship with the breeding ground, wintering environment and other ecological laws, the use of migratory birds to protect agricultural and forestry production and maintain ecological balance, ensure aviation safety, and plan to use economic migratory birds will bring huge social and economic benefits and ecological benefits to human beings.

3. Characteristics: The results of the study show that many birds migrate seasonally. Forty per cent of the 589 species of birds that breed on land in the Palearctic region, a total of about 5 billion birds, fly south each year to spend the winter, not counting those that migrate in the region.

The migration of birds tends to form a certain formation and follow a certain route. The distance of migration is both short and far, from a few kilometers to tens of thousands of kilometers.

Many places in China have welcomed migratory birds, what kind of project is the migration of migratory birds? Let's talk about it. <>

Migratory birds are birds that migrate between their wintering and breeding grounds each year. Swallows, swans, red-crowned cranes, and other birds that are common in life belong to migratory birds, whereas sparrows, magpies, woodpeckers, and other birds that live in one place all year round belong to the category of resident birds. Temperature and food are the main conditions for the survival of migratory birds, and they are also the driving force for migratory birds.

Among them, food is especially important for birds. In winter, migratory birds have a hard time finding food under the snow and ice. In order to get enough food, migratory birds choose to fly in search of suitable habitats.

Over thousands of years, this drive has developed into a fixed habit, but there are some special cases that arise. <>

If there is enough food in the area, some migratory birds may stay there and stop migrating. Environmental damage is also one of the reasons for the change in migratory bird migration rules. During the migration process, geese will "line up" into "people", which is the embodiment of the structure of the bird community.

Not only geese, but also other birds have a different division of labor from human society. Some are responsible for foraging, and some are responsible for standing guard while other birds are resting. They perform their duties and work together to maintain the stable life of the species.

For migratory birds, migration occurs once a year, and migration is also a huge project, with thousands of kilometers often forming unique migration strategies. Migratory birds usually congregate together and maintain a fixed formation, such as herringbone or zigzag, in order to use the air currents to reduce physical exertion during migration; Large birds and birds of prey have few natural predators in terms of migration timing, so they often migrate during the day, using the updrafts caused by sunlight to conserve energy. In order to save energy, they line up as "people" during the migration.

And with global warming, this is actually changing the natural geography of the living environment. Then these migratory birds can only adapt to climate change, and the migratory birds need to change their migration habits and reach the breeding area when there is enough food, but this is not easy.

Migratory bird migration is a very large project, and migratory birds not only need physical strength but also a lot of brain power to plan routes and ensure their safety.

This is a big project, you need to choose a good place, and then you have to go through a long distance.

China's coastal areas are the most interesting part of the East Asian-Australasian migratory bird route. This route is home to some of the world's rarest migratory birds, such as the Spoon-billed Sandpiper, which has fewer than 500 in number.

There are many reasons why migratory birds migrateFor example, climate change, food factors, light duration, and genetic influences。There are two theories about the origin of migratory bird behaviorOne is the Northern Homeland Theory, and the other is the Southern Homeland Theory.

OneWhy migratory birds migrate

Migratory birds refer to birds that migrate periodically with different seasons, and there are many types of migratory birds, such as short-distance migratory birds, mid-distance migratory birds, and long-distance migratory birds. There are many reasons for migratory bird migrationThese include climate change, food factors, time spent in the sun, and more。Migratory birds generally fly from the south to the north to nest and breed, and then fly back to the south for the winter when the weather becomes colder, such as swallows.

With the advent of spring in the north, everything recovers, and there are more insects, and the north will have a lot of food at this time.

Migratory birds migrate to the north to alleviate food scarcity, and when the weather gets colder and there are fewer insects, migratory birds fly back to the south. The northern resident sparrow is an omnivorous bird that can eat grass seeds in winter, but swallows only eat insects, and the food is reduced, and in order to survive, migratory birds will set off and fly back to the south. And there isScientists say migratory bird migration is related to the duration of sunlight, which starts migrating when the light duration is below or above average.

Birds are particularly sensitive to light, and changes in light can activate the migratory instinct of migratory birds.

IIHow migratory bird behavior originated

The history of migratory bird migration may be traced back to the glacial age of 10,000 BC, and there are two theories about the origin of migratory bird behaviorOne is the Northern Homeland Theory, and the other is the Southern Homeland Theory. 。According to the Northern Homestead Theory, there may have been a time in history when a violent climate change forced birds to fly south in order to survive. When the climate recedes and the weather warms up in the north, these migratory birds migrate back to the north to breed.

According to the Southern Home Theory, bird migration is to alleviate the pressure of lack of resources during the breeding season, and birds fly to the north and accidentally find that the north is rich in resources and has fewer natural enemies, which is very suitable for the growth of offspring.

IIIIn summary

There are many reasons why migratory birds migrateFor example, climate change, food factors, time spent in the sun, etc。There are two theories about the origin of migratory bird behaviorThey are the Northern Homeland Theory and the Southern Homeland Theory.

It is generally believed that birds migrate to avoid intraspecific competition during the breeding season. In addition, factors such as climate change, predation, or parasitism also affect the selection of suitable breeding areas for birds.

Because migratory birds simply can't stand such a cold environment, according to experts** began to migrate in the 16th century, because by that time the temperature had already changed.

It's because their instinct or the influence of the external environment is that they have too little hair to adapt.