Close up shot of a nile hippopotamus, hippopotamus amphibius spotted on a muddy river swamp, searching for food in its natural habitat

nile hippopotamus hippo amphibius mud flat muddy animal wild wildlife common river vulnerable species conservation mammal large horse mangrove swamp swampy lake hippos shore habitat nature natural africa park zoo national environment sanctuary browse forage eat feed plant water freshwater food hungry reserve leaf ecosystem wetland mudflat riverbank vegetation