In fact, he added the words dai-sheng, the Chinese for "hoopoe," right on the painting. It seems that people at that time saw these two birds as being in the same category. Today's meticulous biological classifications would leave the men of old stumped!
因為孫龍在自己畫上提的是「柔桑戴勝」，想來當時人視連雀與戴勝如同一類，今天生物分類學發達，古人確實要大嘆弗如了！