Question

8. Give reasons for the following:
a) Birds migrate to different regions. State a reason with an example​

Answer 1

Answer:

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.

Answer 2

Birds migrate to different regions for the search of food, Suitable climate, etc

For example:- Continental population of Swainson's thrush Catharus ustalatus which fly far east across North America before turning south via Florida to reach northern south america; This route is believed to be the consequence of a range expansion that occurred about 10,000 years ago.