On average, wildlife ecologists find that “dichromatic” bird species die out nearly 25 percent more often than their monochromatic relatives.
On average, wildlife ecologists find that “dichromatic” bird species die out nearly 25 percent more often than their monochromatic relatives.
野外生态学家发现，平均而言，公、母鸟羽色不同的鸟种，其死亡率比起公、母鸟羽色相同的相似鸟种高了25%。