Fall Bird Migration

Fall is the time of the year when many birds are busy preparing for the long journey to their winter homes. Migration is the movement of birds and other animals from one home to another. Some birds will fly thousands of miles to reach their winter homes!

Birds begin the journey to their winter homes before the food supply in the north runs out. Day length and temperature plays a part in triggering the birds' internal seasonal clocks. Shorter and cooler days means that the food supply is running out. When the water in ponds and lakes begin to freeze over, waterfowl cannot get at food easily and it is time to fly south where it is warmer and open water and food can be found.

In the fall birds begin to flock together getting ready for the big trip south. This is the time of the year when you will see flocks of blackbirds feeding on berries or the V-formation of flocks of geese in flight. It is an important time to build up strength and fuel up for the dangerous voyage.

Birds use fat as fuel for their journey. It is important that they have enough to eat before they leave so they are able to store enough fat for the long distance they must travel. Some birds make many stops, filling up with enough food to make it to the next stage of their journey.

Birds face many hazards during migration. Some may get blown off course or get caught in a storm. Some birds don't have enough food or fat stored to complete the trip. Hunters claim thousands of ducks and geese each year during fall hunting season. Changes in forestry, agriculture and urban expansion are difficult for birds. These changes affect the habitats of birds and other wildlife. Migrating birds depend on the forests and wetlands and sometimes cannot adapt to the changes.

Related Internet Resources:

http://scienceforfamilies.allinfo-about.com/features/birdmigration.html
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