The ruddy shelduck's flying is the "first evidence of extreme high-altitude flight in a duck", according to experts from the University of Exeter. Satellite data was used to track 15 of the ducks ...

A species of duck is able to fly at altitudes of up to 6,800 metres (22,000 feet), researchers have discovered. The ruddy shelduck's flying is the "first evidence of extreme high-altitude flight in a ...