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preferred direction of migration is heritable, and birds appear to orient themselves using Earth's magnetic field. Migrations occur over the course of several weeks, and up to 85% of migration time is spent at perennial stopover sites, where individuals rest and build up fat stores for further travel.

Formation

Geese, like other birds, fly in a V formation. This formation helps to conserve energy in flight, and aids in communication and monitoring of flock mates. Using great white pelicans

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