Two Diabloceratops dinosaurs fight for mating rights.

ACTION • AGGRESSION • ANGER • ANIMAL BEHAVIOR • ANIMAL HEAD • ANIMAL THEMES • ANIMAL • ANIMALS IN THE WILD • ARBOL • ARTWORK • ATTACK • BATTLE • BEAK • BEAST • CAMPANIAN • CENTROSAURINAE • CERAPOD • CERAPODA • CERATOPSIA • CERATOPSID • CHALLENGE • COLOR IMAGE • COLOUR IMAGE • CONFLICT • CONFRONTATION • CREATURE • CRETACEOUS • DANGER • DAY • DEFENDING • DIABLOCERATOPS EATONI • DIABLOCERATOPS • DIGITALLY GENERATED IMAGE • DINOSAUR • DINOSAURS • ENEMY • ENVIRONMENT • EVOLUTION • EXISTENCE • EXTINCT • FACE TO FACE • FACE-TO-FACE • FACING • FEAR • FIERCE • FIGHTING • FRILL • FULL LENGTH • FULL-LENGTH • FURY • HERBIVORE • HOOFED MAMMALS • HORIZONTAL • HORNED • ILLUSTRATION • ILLUSTRATIONS • JUNGLE • LANDSCAPE • LANDSCAPES • LARGE • LATERAL VIEW • MALE ANIMAL • MEGAFAUNA • MENACE • MESOZOIC ERA • NATURAL HISTORY • NATURAL SCIENCES • NATURE STUDY • NATURE • NO PEOPLE • ORNITHISCHIA • OUTDOOR • OUTDOORS • OUTSIDE • PALAEONTOLOGY • PALAEOZOOLOGY • PALEOART • PALEOBIOLOGY • PALEONTOLOGY • PALEOZOOLOGY • PAST • PERIL • POWERFUL • PREHISTORIC ERA • PRIMEVAL • PRIMITIVE • PRIMORDIAL • QUADRUPED • REARING UP • REPTIL • REPTILE • REPTILES • RIVAL • SCIENCE • SCIENCE: EVOLUTION • SIDE VIEW • SPECIES • SPIKED • THREAT • TOUGHNESS • TREE • TREES • TWO ANIMALS • UTAH • VERTEBRATE • VIOLENCE • VIOLENCIA • WILDERNESS • WILDLIFE • WITHOUT PEOPLE • WOODLANDS • WOODS • ZOOLOGY