Each spring, as Shenzhen’s mangroves burst into life, the region becomes a prime spot for birdwatchers observing the endangered, black-faced spoonbill. Known as the giant panda of birds, this species winters in Shenzhen Bay from October to April, in preparation for its northbound migration. Shenzhen Bay, located in southern China and part of the Pearl River Delta expanding into Hong Kong, is a crucial stop-off point for migratory birds using the East Asian-Australasian flyway. The mangroves support over 200 species of birds and host 100,000 migratory birds each winter, drawing enthusiasts and scientists alike to witness these natural spectacles against the backdrop of one of China’s most bustling urban settings.

Known as “Earth’s kidneys,” wetlands provide a variety of ecological benefits: habitats for diverse species, flood containment, pollutant purification, and carbon absorption. But in China, wetland loss and degradation has exposed people to the whims of climate change. What has China done to protect its wetlands, and how should the country better adapt to climate change with wetlands—a “Great Wall” made of mudflats, mangroves, and waterbirds? Jianbin Shi and Xiaojing Gan, two China-based wetland experts from the Paulson Institute, may enlighten us.