One environmental scholar who has done a survey of bird stores says that he once met a "hawker" who claimed to have sold more than 300 crested goshawks in a single season. Since each goshawk nest averages two eggs, that means the invasion of almost 200 nests.
做過鳥店調查的一位生態學者指出，曾有鳥販說自己一季賣出三百多隻鳳頭蒼鷹，對於平均每巢只下兩個蛋的鳳頭蒼鷹，等於得取走近兩百個巢。