Hippo, Hippopotamus amphibius, yawning in Kruger National park, Mpumalanga, South Africa

animals color image danger day environment front view hippo hippopotamus hippopotamus amphibius horizontal kruger national park mouth mpumalanga national park nature nobody one animal opening outdoors photography portrait reflection south africa water wildlife yawning africa african animal aquatic color colour creature hazard herbivore jeopardy mammal outside park perilous portraiture reflecting reflexion south african southern africa treacherous vertebrate warm blooded