Swallow chicks perched on an electric wire wait to be fed by their mother in Gangneung, Gangwon Province, northeastern South Korea, on July 4, 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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