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Several animals can detect Earth's magnetic field and use it during navigation.
One proposed mechanism involves light-sensitive proteins called cryptochromes in the eyes of certain birds.
Research suggests magnetic information may interact with their visual system rather than functioning like a human compass sensation.
Scientists are still investigating exactly what this experience looks like to the animal.
A migrating bird may perceive navigational information in a sensory form humans simply don't possess.
© University of Oldenburg