Question

Birds have several reasons to migrate at the beginning of fall each

year. Unlike humans, they do not have a warm house to go to or a jacket to put on in cooler weather. Birds can automatically sense when it is time to leave their summer time habitat and move to their winter homes. Often, the Harvest Moon signals birds to start their migration. One of the main reasons to move on is their food source. When insects that are a major food source become scarce due to cooler temperatures, birds begin the trip south. Most birds are not adapted to cold winters, so migration to a warmer area is a necessity. They would not be able to survive the cold winters of their summer time homes. Other birds migrate south because of predators. Large predatory birds often trigger smaller birds to head south as a method of survival. Many birds travel over 5,000 miles each year during their migration. When the seasons change, these birds start the whole process over again.


detail -


detail 2 -


detail 3 -


main idea -

Answer 1

Detail 1 - Often, the Harvest Moon signals birds to start their migration.

Detail 2 - Most birds are not adapted to cold winters, so migration to a warmer area is a necessity.

Detail 3 - Many birds travel over 5,000 miles each year during their migration.

Main Idea - Birds have several reasons to migrate at the beginning of fall each year.

Step-by-step explanation:

Three important details, and the main idea.