Stock Photo - Grey Heron Ardea cinerea - Hostile attack of a heron and flight of its rival The herons at Sunset Dam use the back of the usually unconcerned hippopotamus´ Hippopotamus amphibius as a base for hunting fish in the lake and sometimes dispute over the best hunting ground Sunset Dam, Kruger National Park, South Africa

Stock Photo: Grey Heron Ardea cinerea - Hostile attack of a heron and flight of its rival  The herons at Sunset Dam use the back of the usually unconcerned hippopotamus'.

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