A spoon-billed sandpiper is seen in a wetland of Danzhou, south China's Hainan Province, Dec. 5, 2022.

Spoon-billed sandpipers are under first-class national protection in China. Due to the strengthening protection of wetlands and birds in recent years, this year is the fourth consecutive year for Danzhou to welcome spoon-billed sandpipers in winter. (Xinhua/Pu Xiaoxu)

A spoon-billed sandpiper is seen in a wetland of Danzhou, south China's Hainan Province, Dec. 5, 2022.

Spoon-billed sandpipers are under first-class national protection in China. Due to the strengthening protection of wetlands and birds in recent years, this year is the fourth consecutive year for Danzhou to welcome spoon-billed sandpipers in winter. (Xinhua/Pu Xiaoxu)

People observe birds at a wetland of Danzhou, south China's Hainan Province, Dec. 5, 2022.

Spoon-billed sandpipers are under first-class national protection in China. Due to the strengthening protection of wetlands and birds in recent years, this year is the fourth consecutive year for Danzhou to welcome spoon-billed sandpipers in winter. (Xinhua/Pu Xiaoxu)

A spoon-billed sandpiper is seen in a wetland of Danzhou, south China's Hainan Province, Dec. 5, 2022.

Spoon-billed sandpipers are under first-class national protection in China. Due to the strengthening protection of wetlands and birds in recent years, this year is the fourth consecutive year for Danzhou to welcome spoon-billed sandpipers in winter. (Xinhua/Pu Xiaoxu)

A spoon-billed sandpiper forages at a wetland of Danzhou, south China's Hainan Province, Dec. 5, 2022.

Spoon-billed sandpipers are under first-class national protection in China. Due to the strengthening protection of wetlands and birds in recent years, this year is the fourth consecutive year for Danzhou to welcome spoon-billed sandpipers in winter. (Xinhua/Pu Xiaoxu)

A spoon-billed sandpiper forages at a wetland of Danzhou, south China's Hainan Province, Dec. 5, 2022.

Spoon-billed sandpipers are under first-class national protection in China. Due to the strengthening protection of wetlands and birds in recent years, this year is the fourth consecutive year for Danzhou to welcome spoon-billed sandpipers in winter. (Xinhua/Pu Xiaoxu)