World Migratory Bird Day
“Intuitions are like migratory birds, they come without a map without a reason.”
This day is celebrated on 10th October. Every year this day is celebrated to raise awareness about the problems which are faced by migratory birds. On this day inspiration is also given to people to save and protect birds.
The theme of this year is “Protect Birds: Be the solution to Plastic Pollution.” Because of plastics many birds lost their lives and it also created pollution all over the world. Plastics harm birds because birds eat plastic or they are trapped in plastic and then eventually they die because they can’t rescue themselves.
The Secretariat of the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) initiated world migratory day in the year 2006.
Migration means going from one place to another place. Birds have inherent qualities that is why they migrate from one place to another for favourable climatic conditions to them. Migration is a two way journey. First From home to the new place and second from the new place to the home.
Bird migration may be described as “changes of habitat periodically recurring and altering in direction, which tend to secure optimum environmental conditions at all times”,according to L. Thomson (1926).
“The sound of birds stops the noise in my mind.”
TYPES OF MIGRATION
Migration in birds is of many types. Here we have mentioned some of them for you.
- Latitudinal Migration
- Longitudinal Migration
- Altitudinal or Vertical Migration
- Partial Migration
- Total Migration
- Vagrant or Irregular Migration
- Seasonal Migration
- Diurnal Migration
- Nocturnal Migration
- Loop Migration
- Nomadic Migration
- Irruptive Migration
- Drift Migration
- Reverse Migration
The migration between the two latitudes from from north to south and vice versa is called latitudinal migration. From the Arctic to the tropics, birds mostly migrate.
When the birds migrate from east to west and vice- versa, the migration is called longitudinal migration. In Europe,mostly birds migrate by this migration.
ALTITUDINAL OR VERTICAL MIGRATION:
Birds that breed in tall mountains migrate vertically. The movement to lower elevations in winter is called altitudinal or vertical migration. This migration is done when harsh weather and deep snowfall may make staying at upper elevations impossible.
All the birds do not participate in migration. When birds migrate partially then the migration is called partial migration.
This type of migration is when all the birds of the species migrate. When all species take part in migration the migration is called total migration.
VAGRANT OR IRREGULAR MIGRATION:
Some of the birds disappear in a short distance for food and safety, the migration is called vagrant or irregular migration. Herons,Glossy ibis, spotted eagle, and bee eater are the examples of irregular migratory birds.
This is a well known migration in birds. The migration when the season and the climatic conditions change is called the seasonal migration. This migration is when birds move between breeding and non-breeding ranges.
Many large birds migrate during daytime in search of food. The migration when it is done during the day is called diurnal migration. The birds of diurnal migration generally migrate in flocks.
Some small sized birds such as sparrows, warblers, etc, migrate during nighttime or in the dark to get protected from their enemies. The migration during the dark is called nocturnal migration.
Some birds migrate by following an annual circle of migration. The migration in which the birds follow two distinctly different routes to and from breeding grounds, by taking advantage of varied resources at different times of the year is called loop migration.
Some birds migrate only for food. The migration when the resources are finished or not available and after some time coming back to the same place when the conditions are normal is called nomadic migration.
The migrating birds that exhibit irruptive patterns is called irruptive migration. This migration is in search of suitable food and water.
When some birds get drifted from their routes, they are pushed by storms called drift migration. This type of migration is very rare.
It is seen many times when some young birds lose their ways and start migration in the opposite direction. The migration in which lost birds go in the opposite direction or reverse direction is called reverse migration.
“No bird soars too high if he soars with his own wings.”
FACTS ABOUT MIGRATION IN BIRDS
- 40 percent of the birds in the world are migrants.
- Bar-headed geese are the highest-flying migratory birds.
- Snipe is the fastest migratory bird.
- The bar-tailed god wit can fly non stop for nearly 7,000 miles.
- In the U.N states around one million birds die every year due to window collision.
- Some birds double their body weight while flying.
- The birds that can not fly, also migrate.
- Hummingbirds are the smallest migratory birds.
- Migratory birds do not need any map or direction for migration, they know where to go during migration.
- Birds build up their body fat, before migration.
- All the birds do not migrate at the same time.
- Birds migrate at different times.
- Wisconsin is the most popular state where birds migrate.
- During migration birds face many obstacles and threats.
- birds need food, water, and nesting materials, when landing in yards after migration.
“Birds are the most accomplished astronauts the world has ever seen. They fly high and low, at great speed, and very slowly. And always with extraordinary precision and control.”
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Happy World Migratory Day.