Thus there is no way one can find and observe these birds just using one's own two legs. Therefore when Sun Yuan-hsun catches owls he attaches radio transmitters to them so that he can trace their movements in the mountains.
如此要靠著兩條腿滿山找鳥加以觀察不可能，因此在抓到鳥後，孫元勳就裝上發報器追蹤鳥在山區的位置。