Why do some birds living in extremely cold climate so migration
Answers
Answer:
The birds from Northern hemisphere migrate from those regions to tropical regions during winters to escape from the harsh winter.
These birds beef-up before migration and start their southern sojourn. And winter is the breeding season for most migrating birds. The eggs and chicks wouldn't survive the sub zero degree temperate. And the food resources dry-up/ freeze-up. These birds have no choice but to relocate.
Tropical regions are warm and the winters are bearable, and the monsoon provides ample food resources.
Explanation:
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Answer:
Why Do Birds Migrate?
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.
Birds that nest in the Northern Hemisphere tend to migrate northward in the spring to take advantage of burgeoning insect populations, budding plants and an abundance of nesting locations. As winter approaches and the availability of insects and other food drops, the birds move south again. Escaping the cold is a motivating factor but many species, including hummingbirds, can withstand freezing temperatures as long as an adequate supply of food is available.