This was none other than Sun Yuan-hsun, searching for angles from which he could receive the signals from the owls 'transmitters. But along Hualien County's Shakatang River there are no forestry roads, so he makes his way upstream with a rucksack on his back, looking for traces of the owls' presence as he goes.
但在花蓮沙卡礑溪，沒有林道，他只能背著背包、靠著兩條腿溯溪，沿途追逐鳥蹤。