prepare a presentation on Migratory Birds-Tracing Their Flights
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Answer:
Presentation on Migratory Birds
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Slide 1: Introduction- Birds migrate when climate become unfavorable for them. They migrate because of food and safe place to breed. Some birds breed in summer season so when winter comes those birds migrate to the warmer climate for breeding. Some birds breed in colder climate so they migrate in when summer started. These birds always migrate in a group that protects them from predators. Reason behind migration is that the limited source of food.
Slide 2: Tracing Flights- Their migratory routes are not fixed. Some group follow one route some follow another route. Some migratory birds travel to south by a different route such as Golden Plover. Some birds fly over a long distance while others fly less distance. These migratory birds fly faster during their migration than the ordinary flight. Their flight occurs between 500 to 5000 feet above the sea level.
Slide 3: Examples of Migratory birds-
Black Woodpecker- These birds spend their winter in north for the better food resources and breeding place.
Siberian Cranes- These birds migrate during winter in India and they breed in arctic of Russia and Siberia.
Black headed bunting- They migrate during the winter in Bosipota India.
Demoiselle Crane- They mostly live in different environment but they spend their winter in Indian Subcontinent.
During winter season India becomes the most favorable place for the migratory birds. There are varieties of birds you can see in winter season.
Explanation:
Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. Many species of bird migrate. Migration carries high costs in predation and mortality, including from hunting by humans, and is driven primarily by availability of food. It occurs mainly in the northern hemisphere, where birds are funneled on to specific routes by natural barriers such as the Mediterranean Sea or the Caribbean Sea.
A flock of barnacle geese during autumn migration
Examples of long-distance bird migration routes
Migration of species such as storks, turtle doves, and swallows was recorded as many as 3,000 years ago by Ancient Greek authors, including Homer and Aristotle, and in the Book of Job. More recently, Johannes Leche began recording dates of arrivals of spring migrants in Finland in 1749, and modern scientific studies have used techniques including bird ringing and satellite tracking to trace migrants. Threats to migratory birds have grown with habitat destruction especially of stopover and wintering sites, as well as structures such as power lines and wind farms.
The Arctic tern holds the long-distance migration record for birds, travelling between Arctic breeding grounds and the Antarctic each year. Some species of tubenoses (Procellariiformes) such as albatrosses circle the earth, flying over the southern oceans, while others such as Manx shearwaters migrate 14,000 km (8,700 mi) between their northern breeding grounds and the southern ocean. Shorter migrations are common, including altitudinal migrations on mountains such as the Andes and Himalayas.
The timing of migration seems to be controlled primarily by changes in day length. Migrating birds navigate using celestial cues from the sun and stars, the earth's magnetic field, and mental maps.