Moreover, there is a great deal of information available from foreign sources about the behavior of the black kite. Therefore it is unnecessary to spend a great deal of time doing comprehensive field observations. Would it not be better if Shen focused his energies instead on explaining why the number of black kites in Taiwan is declining?
再加上關於黑鳶的習性行為，國外已經有許多資料累積，不須再多花時間做野外全面的觀察，而應該把精力集中在解釋「為什麼台灣黑鳶數量如此稀少」。