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Which of the following birds is part of a migratory group?
Eastern bluebird and the common crow
Eastern bluebird, mallard duck, and common nighthawk
Eastern bluebird and the great horned owl
All the above
The correct answer is: Eastern bluebird, mallard duck, and common nighthawk
The Eastern bluebird, mallard duck, and common nighthawk are all known to participate in migration. The Eastern bluebird migrates to southern regions during the winter months to avoid harsh conditions, while the mallard duck is also highly migratory, with many populations traveling long distances in search of open water and food sources. The common nighthawk engages in migration as well, particularly in the fall, moving to warmer climates in Central and South America for the winter. In contrast, the other groups listed do not include a complete set of migratory species. For example, the common crow is often considered resident or locally migratory rather than committed long-distance migrants, and the great horned owl does not migrate in the same way that the others do. Thus, the correct choice highlights a group of birds that actively engage in migration, making them a representative sample of migratory species.