Beijing, August 30 (Youth.cn) - Groups of red-billed gulls migrate to Songhua River drainage basin in Harbin. One of habitats for red-billed gulls, the drainage basin is landed with them over spring and autumn. They migrate to the area with their babies born elsewhere. Hundreds of red-billed gulls, forming groups, can be seen migrating to wetlands and river flats near the Songhua River. Juvenile birds sometimes are “pushed” by adult birds to learn flying or seeking foods when they are standing at quays enjoying sunshine. Photo/VCG