What do you mean by migration. Write the causes of migration of birds.
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Answers
Answer:
Migration:
Migration is a way to move from one place to another in order to live and work. Movement of people from their home to another city, state or country for a job, shelter or some other reasons is called migration.
Explanation:
Causes of migration of birds:
Birds migrate to move from areas of low or decreasing resources to areas of high or increasing resources. The two primary resources being sought are food and nesting locations. ... As winter approaches and the availability of insects and other food drops, the birds move south again.
Answer: 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 predication and mortality, including from hunting by humans, and is driven primarily by availability of food.
Explanation:
Other factors, viz., scarcity of food, shortening of daylight and increase of cold are believed to stimulate migration. Migration in birds depends upon two important factors— stimulus and guidance. Scarcity of food and fall of daylight are believed to produce endocrinal changes which initiate bird migration.
Endocrinal means :1. endocrinal - of or belonging to endocrine glands or their secretions; "endocrine system" endocrine.