Momoge National Wetland Reserve in northeast China's Jilin Province is an important stop for migratory birds. Every autumn, the white crane, a national first-class protected animal, leads its young cranes (born in summer) to fly here from Siberia and stop for food. Usually a pair of white cranes brings a young bird. This year, conservation observers spotted four white cranes foraging together. Experts say this rare phenomenon shows that biodiversity conservation is paying off.