translation.en: Now, monarchs are extremely famous for their spectacular migrations from the U.S. and Canada down to Mexico every year, where millions of them come together, but it's not why I started studying them.
translation.zh: 帝王斑蝶以它们壮观的迁徙而闻名 每年不计其数的帝王斑蝶来到一起 从美国和加拿大迁徙到墨西哥 但这并非我研究它们的原因