Residents gather at Shenzhen Bay Park on Sunday to watch the spectacle of migratory birds. Shenzhen Bay’s coastal wetlands, rich in fish and shrimp, provide an ideal feeding ground for migratory birds. From October through May, tens of thousands of birds — including species such as the black-faced spoonbill, tufted duck, and northern shoveler — pause here to rest and forage. The best time to observe them is between November and February.China News Service