Hippopotamuses (Hippopotamus amphibius) in the river Khwai, Okavango Delta, Botswana, Africa

hippopotamuses hippopotamus amphibius river khwai okavango delta botswana africa hippopotamus hippo yawning sunset golden light river swimming water animal wildlife africa nature mammal wild african riverbank open mouth large aquatic fauna golden hour evening twilight reflection landscape savanna riverine endangered herbivore big game safari travel safari adventure nature scene wild scene hippopotamus behavior hippo behavior mammal behavior