Why is Futian mangrove called a paradise for waiting birds?

Adequate food and good habitat. Shenzhen Futian Mangrove National Nature Reserve has a large mangrove area, and the oasis between cities provides a good habitat for waterfowl in winter. At the same time, there is plenty of food in Futian mangrove area. At low tide, the water level on the beach becomes lower, which is convenient for birds to feed. At high tide, birds can fly to mangroves and fish ponds to live.