Two omnivorous Entelodon pigs face each other in a territorial fight.

2 ANIMALS • AGGRESSION • ANGER • ANGRY • ANIMAL BEHAVIOR • ANIMAL THEMES • ANIMAL • ANIMALS HUNTING • ANIMALS IN THE WILD • ARTIODACTYLA • ARTWORK • ASIA • ATTACK • BARREN • BATTLE • BEAST • BOAR • CENOZOIC ERA • CHALLENGE • COLOR IMAGE • COLOUR IMAGE • CONFLICT • CONFRONTATION • CREATURE • DANGER • DAY • DIGITALLY GENERATED IMAGE • ENEMY • ENTELODON • ENTELODONT • ENTELODONTIDAE • EOCENE • EURASIA • EUROPE • EVOLUTION • EXTINCT • FACE TO FACE • FACE-TO-FACE • FACING • FIERCE • FIGHTING • FURY • GRASS • HISSING • HOOFED ANIMAL = HOOVED ANIMAL • HOOFED ANIMAL • HOOFED MAMMALS • HOOVED ANIMAL • HORIZONTAL • ILLUSTRATION • ILLUSTRATIONS • ILUSTRATION • LANDSCAPE • LANDSCAPES • LATERAL VIEW • MAMMAL • MENACE • MENACING • MOUNTAIN • NATURAL HISTORY • NATURAL SCIENCES • NATURE STUDY • NATURE • NEOGENE • NEOZOIC ERA • NO PEOPLE • OLIGOCENE • OMNIVORE • OUTDOOR • OUTDOORS • OUTSIDE • PALAEONTOLOGY • PALAEOZOOLOGY • PALEOART • PALEOBIOLOGY • PALEONTOLOGY • PALEOZOOLOGY • PERIL • PIG • PREDATOR • PREHISTORIC ERA • PRIMEVAL • PRIMITIVE • RAGE • RIVAL • SCIENCE: EVOLUTION • SIDE VIEW • SNARLING • SURVIVAL • TERRITORY • TERTIARY • THREAT • TWO ANIMALS • UGLINESS • UNGULATE • VERTEBRATE • VICIOUS • WILD BOAR • WILD PIG • WILD PIGS • WILDERNESS • WILDLIFE • WITHOUT PEOPLE • WRATH • ZOOLOGY