Why is this woman flying 4,500 miles?
British conservationist Sacha Dench is on the first leg of an epic 4,500 mile paramotor flight that takes her from the Russian Arctic to Britain.
She is following the migratory route of the Bewick's swan in an attempt to understand why their numbers have halved in the past two decades.
Her flight carries her across 11 countries in 10 weeks, through high winds and cold temperatures - and ultimately across the channel - in an attempt to observe the swans' habits and discover the hazards they face as they fly.
The BBC's Moscow team went to meet Sacha on one of her stops.
28 Sep 2016