A grey heron is seen with a freshly caught fish at the Hengshui Lake in Hengshui, north China's Hebei Province, June 7, 2026. (Xinhua/Lang Bingbing)HENGSHUI, June 8 (Xinhua) -- As a key wetland ecosystem in northern China and a vital stopover for migratory birds on the East Asian-Australasian Flyway, Hengshui Lake, with its excellent ecological environment, has become an ideal home for numerous rare birds to inhabit, breed, and rest.A Chinese pond heron is seen at the Hengshui Lake in Hengshui, north China's Hebei Province, June 7, 2026. (Xinhua/Lang Bingbing)Egrets are seen at the Hengshui Lake in Hengshui, north China's Hebei Province, June 7, 2026. (Xinhua/Lang Bingbing)Night herons are seen at the Hengshui Lake in Hengshui, north China's Hebei Province, June 7, 2026. (Xinhua/Lang Bingbing)Great crested grebes are seen at the Hengshui Lake in Hengshui, north China's Hebei Province, June 7, 2026. (Xinhua/Wu Qinghao)A panoramic drone photo taken on June 7, 2026 shows a view of the Hengshui Lake in Hengshui, north China's Hebei Province. (Xinhua/Yang Wenbin)A staff member cleans the aviary of cranes at a hospital for migrant birds near the Hengshui Lake in Hengshui, north China's Hebei Province, June 7, 2026. (Xinhua/Yang Wenbin)A staff member interacts with a red-crowned crane at a hospital for migrant birds near the Hengshui Lake in Hengshui, north China's Hebei Province, June 7, 2026. (Xinhua/Yang Wenbin)A heron is seen flying at the Hengshui Lake in Hengshui, north China's Hebei Province, June 7, 2026. (Xinhua/Li Ran)Great crested grebes are seen at the Hengshui Lake in Hengshui, north China's Hebei Province, June 7, 2026. (Xinhua/Li Ran)A heron is seen flying at the Hengshui Lake in Hengshui, north China's Hebei Province, June 7, 2026. (Xinhua/Li Ran)A drone photo taken on June 7, 2026 shows a view of the Hengshui Lake in Hengshui, north China's Hebei Province. (Xinhua/Jiang Han)A drone photo taken on June 7, 2026 shows a view of the Hengshui Lake in Hengshui, north China's Hebei Province. (Xinhua/Jiang Han)A drone photo taken on June 7, 2026 shows a staff member patrolling at the Hengshui Lake in Hengshui, north China's Hebei Province. (Xinhua/Jiang Han)A drone photo taken on June 7, 2026 shows herons at the Hengshui Lake in Hengshui, north China's Hebei Province. (Xinhua/Jiang Han)A staff member presents a rescued swan at a hospital for migrant birds near the Hengshui Lake in Hengshui, north China's Hebei Province, June 7, 2026. (Xinhua/Sun Huanjie)■