BoredStiff writes "Heard on NPR and reported in ScienceDaily: a study finding that migratory birds may be able to 'see' magnetic fields. The report comes from a current study by a research group from Oldenburg, Germany. They found that migratory birds use their visual system to perceive the reference compass direction of the geomagnetic field: 'Sensory systems process their particular stimuli along specific brain circuits. Thus, the identification of what sensory system is active during magnetic compass orientation, provides a way to recognize the sensory quality utilized during that specific behavior.'"
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