Originally from different places, the White-Headed Weng (Hartert's Chinese Bulbul) and the Black-Headed Weng (Styan's Bulbul) came to live in western Taiwan and eastern Taiwan respectively.
白頭翁與烏頭翁，原本楚河漢界，一定居台灣西部，一落腳台灣東部；如今他們卻悄悄展開「聯姻」。