Hippopotamus peeking out of the water with trees in foreground in Kruger National Park, South Africa - 4K

wildlife hippo hippopotamus amphibious swimming stealth hunting conservation kruger watchful animals herbivore adult nature floating ecology national park resting hidden environment habitat peeking camouflage predator wild river prey water cautious sea secret sleeping behaviour surface underwater safari big bushes still leaves looking waves natural tired trees green danger face eyes