Question

Why bird do migrate!
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Answer 1

Explanation:

Birds migrate in order to find abundant food and favourable place to breed

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Answer 2

Answer:

Birds migrate to move from areas of low or decreasing resources to areas of high or increasing resources. The main reasons are food and nesting locations.

Birds that nest in the Northern Hemisphere tend to migrate northward in the spring to take advantage of 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.

Types Of Migration

Permanent residents do not migrate. 

Short-distance migrants move only a short distance.

Long-distance migrants typically move long distance.