Man is insignificant in front of nature and its creation.
Birds are the most beautiful creatures on this earth! They are pretty amazing. Bird migration is as fascinating as birds. How they find their way back and forth across the world is a matter of curiosity. There are many wonders in this nature. For many years, the Earth’s magnetic field has been suspected as one of several navigational clues. Birds migrate thousands of miles without GPS, using the Earth’s magnetic field to orient themselves. How they were able to do this has long been a mystery, but now, scientists have discovered the key reason behind it. A molecule in the eye is sensitive to magnetism and gives birds a working internal compass. Every spring and fall, millions of birds unfold a spectacle in the night sky in a long effort. Every year, billions of songbirds migrate thousands of miles between Europe and Africa – and then repeat the same journey year after year, to nest in the same place they chose on their first great journey. Many of the thousands of bird species involved in this annual migration travel at night, when the wind currents soften and the moon and stars guide their path. India is the winter home for most Siberian birds such as Siberian cranes, greater flamingos, and demos cranes, as well as several species of birds from other regions of the world. These beautiful birds migrate to India every year during the winter and summer seasons for feeding, breeding, and nesting.
Migratory birds fly hundreds and even thousands of kilometers in search of better environmental conditions and habitats to feed,
Why Do Birds Migrate?
Birds migrate from areas of low resources to areas of high or increasing resources. Birds that nest in the Northern Hemisphere migrate northward in the spring to take advantage of growing insect populations, budding plants, and abundant nesting sites. As winter approaches and insects and other foods become available, the birds move south again. Escape from the cold is the most motivating factor, but many species, including hummingbirds, can withstand freezing temperatures as long as an adequate food supply is available. Movement between habitats of some migratory birds and mammals can sometimes exceed thousands of miles/kilometers. Birds can reach higher altitudes as they migrate.
Migration is extremely dangerous for birds, and many never return to their starting point. Sometimes natural events such as harsh weather play a role, but many times, human activities are responsible for the premature death of birds.
Flightless birds also migrate. Emus, large Australian birds, travel miles on foot to find food, and many populations of penguins migrate by swimming.
Many bird species breed and successfully raise their young only under certain environmental conditions. Whether they require certain temperatures, the presence of specific food and nesting materials, or a general location, birds are incredibly sensitive to these conditions.
The migration route involves nesting and requires the availability of habitats before and after each migration. Migratory birds fly hundreds and even thousands of kilometers in search of better environmental conditions and habitats to feed, reproduce and raise their young. When conditions are unfavorable for breeding, it is time to fly to areas where conditions are better. Birds depend on a habitat that provides enough food to nest and raise young, but because of habitat, food availability, and climate change with the seasons, birds must move from place to place to survive and thrive. A migratory bird’s stimulus is hormonal, the change in natural sunlight triggers hormones that cause them to become restless, gather in flocks, and eat more food to store up for the long journey ahead.
For all birds, one of the main driving forces behind migration is the lack of food. If all birds were to remain in the same rich, tropical areas year-round, food would be scarce and breeding would be less successful with malnourished parents and hungry young. But as food sources regenerate in northern regions each spring, millions of birds migrate to those regions to take advantage of the abundance. As food supplies dwindle in the fall, birds return to tropical areas.
How Do Birds Navigate?
Migratory birds can cover thousands of miles on their annual journey, usually traveling the same course year after year with little deviation. First-year birds often make their first migration on their own. Somehow they may find their winter home, even if they have never seen it before, and return to the place of their birth the following spring. The secrets of birds’ amazing navigational skills are not fully understood because they integrate different types of senses while navigating. Birds can get compass information from the sun and stars and by sensing the Earth’s magnetic field. They also get information from the position of the sunset and landmarks seen during the day.
There is evidence that the sense of smell plays a role in pigeons. Waterfowl and cranes follow preferred routes in their annual migration. These routes are often associated with important stopovers that provide critical food supplies for the birds’ survival. Small birds migrate across the landscape on wide fronts. It’s not hard to imagine finding your way by following a river, the North Star, or a nose. Ability to sense the Earth’s magnetic field. From this mapping process are visual markers, specific sounds, distinct smells, and inherent social cues. This ability of birds is commonly known as piloting.
Birds are a wonderful creation of this nature. Flying thousands of kilometers without any GPS is amazing. Birds create a mental map of their migration patterns by relying on large-scale environmental cues. So the bird observes the mountain range and not just the tree. Young birds get some map ‘in-built’, meaning it is genetically coded, and then their parents help them with practice runs before long journeys. Another method is recommended for birds traveling over large bodies of water or land without obvious symptoms due to rain or snow. Some things never change, and the most constant of them is the orientation of the sun and stars. Scientists have concluded that some species of birds use sky navigation similar to that used by sailors and explorers and find their way through challenging weather rather than looking down. The concept of vision-based magnetoreception suggests that birds can see the heat-generated contours of magnetic fields and orient themselves in the direction of the field they wish to travel. Man is insignificant in front of nature and its creation.
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