They fly to my hometown, Kunming, every year since I was child, never breaking off. They come in the winter and leave in next spring. We are very happy to see them being there, and feed them. I don't know why they go there every year, for me, it is a incredible thing, because  the place they visit is a city, and you can see from the picture, the lake is in the middle of the city and surrounded by buildings. Why they visit us regularly remains unresolved.

These seagulls leave their home in Siberia in early November, and arrive in Kunming after half a month flight , staying in there for about 4 months.