Why do animals migrate in large numbers? What are the causes of the Great Migration of African Anima

The root cause of animal migration is natural selection, and species that migrate are able to leave more offspring than those that do not. And if you don't migrate, sooner or later the resources of that place will be consumed, and choosing to migrate is conducive to your own survival and reproduction. Be able to better protect yourself.

For example: "The summer sunshine in the north and south poles is very long, and the invertebrates are abundant in the short term, whether they are insects on land or prawns in the ocean, which is extremely beneficial for the reproduction of many birds and cetaceans that feed on them, but in winter there is less food to survive; These animals will not be able to survive in the polar regions, so they will have to migrate. ”

Every year around June, the grass in the Tanzanian savannah is gradually consumed, and food becomes less and less. For food, the animals of the grasslands travel more than 3,000 kilometers to stage some of the most spectacular animal migrations on the planet.

In September 2016, an army of millions of animals ran over the vast savannah, and the scene was spectacular and immense. They migrate from the southern Serengeti Park in Tanzania to the Masai Mara Game Reserve in Kenya.

From December to May, Africa's herbivores roam the protected areas of the Serengeti National Park. There are abundant aquatic plants that provide them with enough food.

The Serengeti National Park in Africa has its dry season from mid-to-late May, during which the park's aquatic weeds cannot meet the needs of the large number of herbivores, so herbivores begin to migrate to the northwest of the Serengeti in pursuit of grass and water. June is the lactation period for African animals, and at this time, a large number of small wildebeest will be born on the migration route, so the great migration of animals is definitely very difficult for these small creatures. In the month of each year, the continuous drought threatens the survival of the animals, so a large number of animals cross the border to cross the Mara River to the Masai Mara, and this situation continues until September.

From October, the Serengeti savannah in Africa begins to usher in the rainy season again, and the grass begins to turn green under the moisture of the rain. At the same time, only about a tenth the size of the Serengeti, the Maasai Mara National Park is not large enough to sustain a large population of herbivores. So, the animals began to move south from the Eastern Front to the Serengeti again, and the whole process lasted about a month.

It basically ends in December of each year. In December, the animals return to their homes and begin to reproduce and recuperate, gradually replenishing the number of their species lost on the way in preparation for the next year. <>

1. Reproduction. In order to reproduce better, they migrate. Examples include large-scale salmon migrations in North America and Russia.

2. Foraging. In order to meet the needs of survival, they had to migrate. For example, the Great Wildebeest Migration in East Africa.

3. Migration caused by seasonal changes, such as temperature and vegetation changes, so geese fly south to seek a good living environment.

4. Migration caused by major natural disasters. Natural disasters refer to natural phenomena that endanger human survival or damage the living environment of human beings, including meteorological disasters such as drought, high temperature, low temperature, cold wave, flood, waterlogging, and mountain floods.

Related Notes:

The Great Migration of Animals refers to the migration of a large number of animals over a certain distance due to breeding, foraging, climate change, etc. There are periodic and non-periodic migrations.

Migratory behavior is not an instinctive activity that is unique to birds. certain invertebrates, such as East Asian locusts, butterflies, etc.; reptiles, such as sea turtles, etc.; Mammals such as bats, whales, seals, deer, and certain fish species change their habitats over long distances during the season.

The migration of animals is regular, directional, and mostly carried out in large groups. Bird migrations occur periodically each year between breeding and wintering areas, mostly between the northern and southern hemispheres, and a few between the east and west.

Animals migrate for the following reasons: searching for food, hibernating, escaping bad weather, reproduction, etc.

1. Look for food

Food is associated with reproduction, as most animals migrate to places where there is enough food for their offspring to survive.

2. Hibernation

Hibernation is essential for the survival of some animals, and a good example of this animal is the small brown bat. In the summer, these creatures live in trees, while they migrate to caves to hibernate in the winter.

3. Escape from bad weather

Most migratory birds migrate because of the change of seasons, and the Arctic Tern is a perfect example of this, as this bird experiences two summers in a year instead of one, thanks to its migration.

4. Reproduction

One of the most common reasons for migration is for animals to find suitable breeding grounds, with crustaceans such as many species of crabs living in the deep sea but going to shallow waters to breed before returning to deeper waters. Amphibians like frogs and toads alternate between breeding ponds and large lakes.

What are the migratory animals?

1. Birds

About 18% of the world's 10,000 bird species migrate due to seasonal changes in climate. Most of these birds fly from north to south. Summer in the north is usually the season for birds to forage and breed, while winter is the season for them to migrate south to warmer places.

For example, the Arctic tern migrates from north to south each year, covering a distance of about 12,000 miles.

2. Fish

Unlike birds, fish do not always migrate long distances, as they may end up migrating in the same place. For example, if a fish inhabits a huge lake and eventually changes its habitat, the migration time will be short, however, some fish can travel hundreds of miles away.

3. Insects

Insect migration usually occurs between winged insects, such as dragonflies, butterflies, and locusts. For these two butterflies, the group that started the migration was not the same butterfly that completed the journey. The reason for this is that because butterflies mate and reproduce in this process, the new generation of butterflies is the generation that has completed the migration.

4. Mammals

A good example of this migration is the famous wildebeest migration in the Serengeti National Park in Africa. In addition to wildebeest, other migratory species include zebras and antelopes. Interestingly, these groups can change their direction, but depending on environmental conditions.

Animal migration is to adapt to the seasonal changes of nature and better survival, and I really want to help you look forward to it

In general, large animals begin to migrate in July and September every year. Because these animals can't adapt to the environment and life of this place, they also want to survive the winter better, so they have to migrate.

In fact, large animals generally migrate from March to June, mainly in search of a more suitable place to live and a living environment.

Migration is usually around December to May. In order to reproduce better, they migrate.

I really don't know, I haven't understood, and many people have big questions about this issue.

The migratory animals are as follows:

1. Wild goose:In order to survive, geese migrate back and forth between breeding grounds and wintering grounds every year, and their migration has a strong time rhythm, and the ancient Chinese have long noticed the relationship between migratory bird migration and seasonal changes.

2. Swallow:Swallows are a migratory bird that comes from the south in March every year, as if they had flown back from the south overnight, and they choose a family's house to build a nest and lay eggs, incubate eggs and brood. After a busy summer, when the weather cools down in late autumn, they fly to the warmer south to spend the winter.

3. Salmon:Salmon, also known as salmon, is a spectacular scene in Alaska where tens of thousands of salmon migrate from the sea to the river, gather by the river to spawn and die.

4, Butterfly King:This large orange-brown butterfly is able to migrate long distances as the seasons change. Every spring, the butterflies always fly in droves from Central America all the way to Canada; In the fall, it returns to Mexico by the same route, a journey of 4,500 kilometers that will take several months.

5. Reindeer:Reindeer are one of the longest migratory mammals of the land mammals. Reindeer do not fly as described in fairy tales, and they may be more than willing to have such abilities themselves.

In fact, reindeer have to migrate 6,000 kilometers. They pass through spruce forests and mountains in the north to the treeless shores of the Arctic Ocean, where they return the same way.

Animals migrate for a variety of reasons: breeding, searching for food, natural disasters.

Some migratory birds return to their breeding grounds in spring every year due to seasons and breeding, and migrate to the southern wintering grounds in autumn to do periodic migration along a certain route in the horizontal direction.

Mammals also migrate periodically for seasonal, breeding and foraging reasons, such as the northern reindeer moving south to the taiga zone in winter and returning to the food-rich tundra zone in spring. In addition to horizontal migration, there is also vertical migration. For example, in the cold season in mountainous areas, animals often move to lower places to forage for food.

Many deep-sea fish and invertebrates spend part of the year in the deep and shallow seas.

Because we have an incredible knowledge of everything in nature, which we cannot attain, Africa, a land that gave birth to ancient civilizations and many lives, where the world's largest and millions of wild animals are constantly running free, living in the laws of nature under the constraints of the least human rules. Every year around June, the grass in the Tanzanian grasslands is gradually consumed and food is scarce. The long dry season makes the animals hungry.

For food, the planet's most spectacular animal migration scene will be staged here, as millions of horns, hundreds of thousands of zebras and antelopes form a huge procession that travels north from Tanzania's Serengeti Reserve to Kenya's Masai Mara National Park, a hike of more than 3,000 kilometres. At the same time, on the road, we should not only pass through the steppes where lions and leopards are.

But also beware of coyotes and crocodiles that may be present at any time, and crocodiles that gather on the narrow banks of the Mara River, predators ready to share in the upcoming feast, and upon arrival, the expedition of more than 2 million herbivorous wildlife will return to the Serengeti again after an arduous chase through the meadows due to climate change. Hunger, thirst, lack of physical strength, and being hunted by predators also ensued.

Out of this team of millions of immigrants, only 30 lucky ones were able to return to their origins, and those who came back with them, 400,000 new lives were born in this exciting journey. From December to May, African herbivores roam the protected areas of the Serengeti National Park. There is an abundance of aquatic plants that provide them with enough food.

Since mid and late May, Africa's Serengeti National Park has enjoyed a dry season.

As for the reason behind why animals migrate, I will explain it here today.

Climate. Because some animals need to migrate according to climate change in order to find a suitable environment to live and avoid death.

Animals should constantly look for a suitable environment to inhabit and adapt to their own living habits, such as geese will fly to the south with warm weather in autumn and fly back in spring. The reason for this is the uncontrolled development of human beings, which has led to many animals losing their homes and having to find new homes.

Because everything in our natural world has been incredibly achieved, which we could not have predicted, Africa, a land that gave birth to ancient civilizations and many lives, where millions of species of wild animals in the world were able to run freely and live with the least amount of human rule under the laws of nature. Every year around June, the grass on the Tanzanian grasslands is gradually consumed and food becomes scarce. The long dry season starves the animals.