Flight of the ornithologist

Australian ornithologist Chris Hassel lives a life that's as migratory as the shorebirds he studies.

Every spring, the 50-year-old takes off from Australia and lands in China's Luannan wetland by Bohai Bay.

Since 2007, he has spent two months a year by the wetland in the coastal city of Tangshan, Hebei province, engaging a shorebird research program funded by Birdlife Netherlands, the World Wide Fund for Nature and Beijing Normal University.