Roller-coaster flight: How geese save energy while migrating

January 16, 2015 3:01 PM

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Roller-coaster flight: How geese save energy while migrating

Every year, flocks of geese fly hundreds of miles over the Himalayas, migrating from their breeding grounds in Mongolia to southeastern Tibet or India for the winter. Now, a new study reveals how these maverick aviators fly so far in the thin mountain air.

Researchers implanted tracking devices in seven bar-headed geese that measured the animals' heart rate, altitude and other parameters. They found that the birds did not remain at a certain altitude for the duration of their flights, and instead, the geese climbed and descended with the contours of ...

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