Tourists and citizens watch and feed the red-beaked gulls at Haigeng Dam in Kunming, southwest China's Yunnan Province, Nov.3, 2021. Around 40,000 res-beaked gulls will immigrate southward to Kunming from Mongolia and Siberia for hibernation every year. (Photos: China News Service/Liu Ranyang)

Tourists and citizens watch and feed the red-beaked gulls at Haigeng Dam in Kunming, southwest China's Yunnan Province, Nov.3, 2021. Around 40,000 res-beaked gulls will immigrate southward to Kunming from Mongolia and Siberia for hibernation every year.

Tourists and citizens watch and feed the red-beaked gulls at Haigeng Dam in Kunming, southwest China's Yunnan Province, Nov.3, 2021. Around 40,000 res-beaked gulls will immigrate southward to Kunming from Mongolia and Siberia for hibernation every year.

Tourists and citizens watch and feed the red-beaked gulls at Haigeng Dam in Kunming, southwest China's Yunnan Province, Nov.3, 2021. Around 40,000 res-beaked gulls will immigrate southward to Kunming from Mongolia and Siberia for hibernation every year.

Two girls feed red-beaked gulls at Haigeng Dam in Kunming, southwest China's Yunnan Province. Around 40,000 res-beaked gulls will immigrate southward to Kunming from Mongolia and Siberia for hibernation every year.

Flying red-beaked gulls along with visitors are screened in the same photo at Haigeng Dam in Kunming, southwest China's Yunnan Province, Nov.3, 2021.