Liu Hsiao-shen and Charlie Sung found traces of the pitta birds in the "mother forest" area in May of 1993. The Yellow Butterfly Valley Protectors were formally established that June.
劉孝伸與宋廷棟於九三年五月在母樹林園區發現八色鳥的蹤跡，因此六月「八色鳥工作室」正式誕生。