Irritator challengeri lets out a loud roar while walking along a Cretaceous shoreline.

AGGRESSION • ANGER • ANIMAL BEHAVIOR • ANIMAL BODY • ANIMAL MOUTH • ANIMAL TEETH • ANIMAL THEMES • ANIMAL TRACKS • ANIMAL • ANIMALS IN THE WILD • ARTWORK • BEACH • BEAST • BIPED • BIRD • BIRD: BIRDS OF PREY • BIRDS OF PREY • CARNIVORE • CLOUD • CLOUDS • COG • COLOR IMAGE • COLOUR IMAGE • CREATURE • CRETACEOUS • DAY • DENTITION • DENTURE • DIGITALLY GENERATED IMAGE • DINOSAUR • DINOSAURS • EVOLUTION • EXISTENCE • EXTINCT • FIERCE • FLEET • FOOTPRINT • FORT • FULL LENGTH • FURY • GROWL • HORIZONTAL • ILLUSTRATION TECHNIQUE • ILLUSTRATION • ILLUSTRATIONS • IRRITATOR CHALLENGERI • IRRITATOR • JAW • LANDSCAPE • LANDSCAPES • LARGE • LATERAL VIEW • MARINE • MEDIUM GROUP OF ANIMALS • MESOZOIC ERA • MONSTER • MOUTH OPEN • NATURAL HISTORY • NATURAL SCIENCES • NATURE STUDY • NAVY • NO PEOPLE • OCEAN • OPEN MOUTH • OPEN-MOUTHED • OUTDOOR • OUTDOORS • OUTSIDE • PALAEONTOLOGY • PALAEOZOOLOGY • PALEOART • PALEOBIOLOGY • PALEONTOLOGY • PALEOZOOLOGY • PAST • PAW PRINTS • PISCIVORE • PREDATOR • PREHISTORIC ERA • PRIMEVAL • PRIMITIVE • PRIMORDIAL • PRONG • REPTIL • REPTILE • REPTILES • ROAMING • ROARING • RUGGED • SAND • SAURISCHIA • SCIENCE • SCIENCE: EVOLUTION • SEA • SEAS • SET OF TEETH • SHARP • SHORE • SHORELINE • SIDE VIEW • SNOUT • SPECIES • SPINOSAURID • STRONG • TALON • TEETH • THEROPOD • TOOTH • TOUGHNESS • VERTEBRATE • WALKING • WATER'S EDGE • WAVE • WILDLIFE • WITHOUT PEOPLE • ZOOLOGY