After a long-distance trip under the polite, if slightly repetitive instruction of your favorite GPS app, nothing is worse that being told how to navigate your own neighborhood.
Migratory birds that can sense the planet's magnetic field might experience a similar irritation over being micromanaged. Researchers from the University of Western Ontario in Canada and Bowling Green State University in the US have found they can lilterally switch off their neurological navigation aid when no longer in need of it.
"This brain region is super important for activating the geomagnetic compass, especially for songbirds when they migrate at night,"psychology graduate student Madeleine Brodbeck from the University of Western Ontario in Canada. The birds were analyzed in three groups in the lab: daytime, nighttime resting, and nighttime migratory restlessness. That restlessness was determined by increased activity, such as wing whirring and perch hopping.
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