After entering winter, the beautiful red-billed lizards will fly back to Kunming again. Whether it is the Cuihu Park in the city or Dianchi Lake, they can see their white figures, and they fly in groups by the lake. Have any friends ever thought about where the seagulls from Kunming Dianchi Lake come from? Why do seagulls occur in Kunming Dianchi Lake every winter?