各地湿地成迁徙候鸟“能量补给站” 吃饱了再去南方越冬

Group 1 - The core viewpoint of the articles highlights the significant migration of birds, particularly in Inner Mongolia and Heilongjiang, as they prepare for their winter journey southward [1][4][6] - The Zenglanqi region in Inner Mongolia is identified as a crucial stopover for migratory birds along the East Asia-Australasia flyway, hosting over 60,000 birds, including 400 national first-class protected white-naped cranes [1][3] - The Sanjiang National Nature Reserve in Heilongjiang serves as an important mid-stop for migratory birds, with a diverse range of species gathering in preparation for their southward migration due to the onset of colder weather [4][6] Group 2 - The Zenglanqi wetland is noted for its rich vegetation and abundant food supply, making it an essential "energy supply station" for migratory birds during their journey [3] - The migration season is particularly active in September and October, with a large number of birds passing through the Sanjiang Nature Reserve, which is expected to conclude by late October [6] - The articles emphasize the ecological importance of these regions as vital habitats for various bird species, including eight first-class and 26 second-class protected species in the Zenglanqi area [3]