Date:
August 17, 2017
Source:
Cell Press
Summary:
Researchers
recently showed that migratory reed warblers depend on an internal geomagnetic
map to guide them on their long-distance journeys. But it wasn't clear how the
birds were solving the difficult 'longitude problem,' determining where they
were along the east-west axis and which way to go. The team's latest report
shows birds rely on changes from east to west in magnetic declination, the
angular difference between geographic north and magnetic north.
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