Plucky duck: highest-flying fowl's Himalayan exploits revealed

Scientists have tracked the ruddy shelduck to 6,800 metres, making it the first duck known to fly at extreme high altitudes

A high-flying species of duck reaches altitudes of up to 6,800 metres (22,000ft) to cross the Himalayas, research from a British university has revealed.

Scientists from the University of Exeter used satellite tracking to find out how ruddy shelducks - which are a similar size to mallards - find their way through the mountain range.