Birds Migration is most evident among birds. Most species, because of their high metabolic rate, require a rich, abundant supply of food at frequent intervals. Most of the thousands of bird species that engage in this annual migration travel at night, when wind currents are smoother and the moon and stars guide their way.
Birds gauge the changing of the seasons based on light level from the angle of the sun in the sky and the overall amount of daily light. When the timing is right for their migrating needs, they will begin their journey. Several minor factors can affect the precise day any bird species begins its migration, however, including:
Why some birds migrate and others don’t is the focus of a complex and active field of research. Finding food generally is believed to be the main driver. Additional motivations could include escape from inclement weather and reducing exposure to predators or parasites, especially during the breeding season. New technological advances, such as sophisticated GPS tags and radar-detection systems, are giving scientists unprecedented opportunities to observe bird migration. It is estimated that more than 60% of some bird species never complete a full round-trip migration, often due to threats such as:
- Inadequate food and lack of energy to travel
- Predators, including wild animals, feral cats, and loose dogs
- Poor weather and storms that cause disorientation
- Light pollution in cities that disorients birds navigating by stars
- Hunting, both legal regulated hunting as well as poaching.
World Migratory Bird Day (WMBD) is observed every year on the second Saturday of May and October. The day is celebrated as an awareness-raising campaign highlighting the need for the conservation of migratory birds and their habitats. It aims to draw attention to the threats faced by migratory birds, their ecological importance, and the need for international cooperation to conserve them.
Examples of Migration Birds
- Siberian Cranes
- Greater Flamingo
- Great White Pelican
- Asiatic Sparrow-Hawk
- Arctic tern (Sterna paradisaea)
Among these Arctic terns Are the longest-distance migration of any bird, and sees more daylight than any other, moving from its Arctic breeding grounds to the Antarctic non-breeding areas.
Migratory Birds Coming to India
India is a winter home for most of the Siberian birds such as Siberian Cranes, Greater Flamingo, and Demoiselle Crane, also numerous species of birds from another region of the world. These beautiful birds migrate to India every year during the winter and summer seasons for food, breeding, and nesting. Here is the list of most beautiful migratory birds coming to India in the winter and summer seasons.
- Siberian Cranes.
- Amur Falcon.
- Greater Flamingo.
- Blue-tailed Bee-eater.
- Bar-headed Goose.
- Rosy Starling.
- Demoiselle Crane.
- Black-winged Stilt.
- Great White Pelican.