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Learned magnetic map cues and two mechanisms of magnetoreception in turtles | Nature

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Loggerhead sea turtles, which undergo long-distance migrations, can learn magnetic signatures associated with different geographic areas and have two different magnetic senses, each based on a different underlying mechanism.

Subjects Animal behaviour Animal migration Abstract Growing evidence indicates that migratory animals exploit the magnetic field of the Earth for navigation, both as a compass to determine direction and as a map to determine geographical position 1 . It has long been proposed that, to navigate using a magnetic map, animals must learn the magnetic coordinates of the destination 2 , 3 , yet the pivotal hypothesis that animals can learn magnetic signatures of geographical areas has, to our knowledge, yet to be tested. Here we report that an iconic navigating species, the loggerhead turtle ( Caret

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