Many areas on the edges of Taiwan's forests have been cleared and planted with bamboo, and these plantations are infested with Asian green snakes. Such areas also offer the eagles a broad, unobstructed view of movements on the ground.
由於台灣森林邊緣常被開墾為竹林，青蛇大行其道，加上人工開墾地視野開闊，便於俯瞰地面動靜，大冠鷲因此喜愛在森林半開發處逗留。