gēn jù / xíng tài / chā yì / kē xué jiā / jiāng / zhè zhǒng / niǎo lèi / huà fēn / wéi / sān gè / yà zhǒng

根据形态差异，科学家将这种鸟类划分为三个亚种。

Based on morphological differences, scientists divide this bird species into three subspecies.