An Alvarezsaurid bird cleans the mouth of a Giganotosaurus carolinii dinosaur.

AGGRESSION • ALVAREZSAURID • ALVAREZSAURS • ANGRY • ANIMAL BEHAVIOR • ANIMAL HEAD • ANIMAL MOUTH • ANIMAL TEETH • ANIMAL THEMES • ANIMAL • ANIMALS HUNTING • ANIMALS IN THE WILD • ARTWORK • BIRD • BITING • BIZARRE • CARCHARODONTOSAURID • CARNASSIAL • CARNIVORE • CARNOSAURIA • CLEANING • COLOR IMAGE • CONFLICT • CONFRONTATION • CREATURE • CRETACEOUS • CURIOSITY • DANGER • DAY • DINOSAUR • DINOSAURS • ENVIRONMENT • EVOLUTION • EXTINCT • FANG • FIERCE • FOOD CHAIN • FORT • FRONT VIEW • GIANT • GIGANOTOSAURUS CAROLINII • GIGANOTOSAURUS • GROWL • HABITAT • HEADSHOT • HISSING • HORIZONTAL • ILLUSTRATION TECHNIQUE • ILLUSTRATION • JAW • LAND • LARGE • LYING DOWN • MENACE • MESOZOIC ERA • MOUTH OPEN • NATURAL HISTORY • NATURAL SCIENCES • NATURE STUDY • NATURE • NO PEOPLE • NOSINESS • OMINOUS • OPEN MOUTH • OPEN-MOUTHED • OUTDOOR • OUTDOORS • OUTSIDE • PAINTING • PALAEONTOLOGY • PALAEOZOOLOGY • PALEOBIOLOGY • PALEONTOLOGY • PALEOZOOLOGY • PAST • PERIL • POWERFUL • PREDATOR • PREHISTORIC ERA • PREY • REPTIL • REPTILE • REPTILES • ROARING • RUGGED • SCAVENGER • SCIENCE: EVOLUTION • SCISSOR TOOTH • SECTORIAL • SHARP • SMALL • SNARLING • SPECIES • STRONG • SURVIVAL • SYMBIOTIC RELATIONSHIP • TERROR • THEROPOD • THREAT • TINY • TOUGHNESS • TRAP • TWO ANIMALS • VERTEBRATE • VICTIM • VICTIMS • VIOLENCE • VIOLENCIA • WAITING • WILDERNESS • WILDLIFE • WITHOUT PEOPLE • ZOOLOGY