According to Liao Sheng-fu, general affairs supervisor at Taitung's Fengli Elementary School and the man responsible for the society's East Taiwan bird population survey, this may be why the Hsiukuluan River bird population is only concentrated at certain points.
野鳥學會東部鳥口調查負責人、台東豐里國小總務主任廖聖福認為，這可能是為什麼秀姑巒溪鳥類只集中在幾個地方的原因。