Introduction to red-crowned cranes on grassland: The Alu Horqin Banner Wetland in the northern part of Horqin Grassland is an important part of the grassland. It has abundant water and grass and is extremely suitable for birds to inhabit and survive. Every year during bird migration, thousands of national rare birds are welcomed here, such as red-crowned cranes, swan geese, gray geese, relict gulls, green-headed divers, etc., adding a bit of beauty to Horqin Grassland.