Cold-blooded reptile, yacare caiman, soaking in the swampy water with eyes half closed, snoozing in the tranquil afternoon surrounded by aquatic plants and vegetations

yacare caiman alligator crocodile ponderous jacare eye alligatoridae argentina brazil south america lake river wetland swamp aquatic nature wild wildlife natural habitat pantanal reptile predator dangerous water head amazon skin snooze carnivore wilderness ibera reserve conservation ecosystem biosphere rest sharp bog marsh mire vegetation plant sleep open scout prey cold blooded