A Grey Heron is struggling to swallow a big fish it caught in Gyeongpocheon Stream, Gangneung-si, Gangwon-do on June 3, 2022.(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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