Hippopotamus

africa animal animal behavior facial expression aquatic boke soft focus botswana creature delta earth ecology ecosystem endangered species environment field grass habitat hippopotamus inhabiting mammalian mammal marsh moremi wildlife reserve motion mouth mouth open nature nature conservation no one no people nobody noon oasis okavango delta okavango river okavango wetlands omnivorous one outdoors protected areas puddle river safari season side view sunny surface level tooth water water place waterside wild wildlife wildlife reserve world heritage world natural heritage