ANSWERS: 3
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It's not a magnet in that sense. It's an instinct rather, which guides them.
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OR it could be that the Earth is just so much stronger
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There's an easy answer to this. The magnet is used for navigation not for balance. So while they are sitting on the wire, they might think home is in a different direction, but it makes no difference, as soon as they take off they will move round to the right heading again.
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