A pair of whooper swans takes off from an ecological pond in Gangneung, Gangwon Province, on South Korea's east coast, on Jan. 10, 2023. The endangered bird is designated as South Korea's Natural Monument No. 201. (Yonhap)
Photos by Yoo Hyung-jae
[Yoo Hyung-jae, who took these pictures, is a photo reporter at Yonhap News Agency who specializes in the ecological field.]
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