Pigeons with a deficient sun compass use the magnetic compass.
Pigeons with a deficient sun compass use the magnetic compass.
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太阳罗盘不足的鸽子使用磁罗盘。
作者：
R. Wiltschko;D. Nohr;W. Wiltschko
中午之前从未见过太阳的信鸽在早上就无法使用太阳罗盘；尽管如此，他们还是以家乡为导向。然而，当这些鸟类携带磁铁时，它们会迷失方向，这表明它们使用的是磁罗盘。这些发现表明，无论是否建立了太阳罗盘，磁罗盘都可供鸽子使用，并且磁罗盘显然是罗盘信息的第一个来源。
Homing pigeons that had never seen the sun before noon could not use the sun compass in the morning; nevertheless they were homeward oriented. When such birds carried magnets, however, they were disoriented, suggesting they were using a magnetic compass. These findings indicate that the magnetic compass is available to pigeons whether or not the sun compass has been established and that the magnetic compass is apparently the first source of compass information.