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Assessment
What primarily triggers the migration of North American birds?
Changes in food availability
Changes in atmospheric pressure
Changes in temperature
Changes in daylight hours
Which of the following birds is well-known for its long-distance migration from North America to Central America?
American Robin
Common Loon
Red-eyed Vireo
Monarch Butterfly
What adaptation do migratory birds have that helps them during their journey?
Permanent nesting habits
Large wingspans
Fat storage for energy
Brightly colored feathers
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