Utahraptor ostrommaysorum, the largest known dromaeosaur.

AGGRESSION • ANGER • ANIMAL FUR • ANIMAL HAIR • ANIMAL HEAD • ANIMAL MARKINGS • ANIMAL TAIL • ANIMAL THEMES • ANIMAL • ARTWORK • BIPED • CARNIVORE • CLAW • CLAWS • COLOR IMAGE • CONTOUR FEATHERS • COPY SPACE • CREATURE • CRETACEOUS • DINOSAUR • DINOSAURS • DROMAEOSAURID • EVOLUTION • EXISTENCE • EXTINCT • FEATHER • FIERCE • FULL LENGTH • FURY • GRAY BACKGROUND • GREY BACKGROUND • GROWL • HISSING • HORIZONTAL • ILLUSTRATION TECHNIQUE • ILLUSTRATION • LARGE • LATERAL VIEW • MESOZOIC ERA • MOUTH OPEN • NATURAL HISTORY • NATURAL SCIENCES • NATURE STUDY • NO PEOPLE • ONE ANIMAL • OPEN MOUTH • OPEN-MOUTHED • PALAEONTOLOGY • PALAEOZOOLOGY • PALEOBIOLOGY • PALEONTOLOGY • PALEOZOOLOGY • PAST • PREHISTORIC ERA • PRIMITIVE • RAPTOR • REPTIL • REPTILE • REPTILES • ROARING • SAUROPSID • SCIENCE • SCIENCE: EVOLUTION • SIDE VIEW • SNARLING • SPECIES • TALON • THEROPOD • UTAHRAPTOR OSTROMMAYSORUM • UTAHRAPTOR • VERTEBRATE • VICIOUS • WILDLIFE • WITHOUT PEOPLE • ZOOLOGY