Hesperornis was a a flightless bird that lived during the Cretaceous Period.

ANIMAL BODY • ANIMAL MOUTH • ANIMAL NECK • ANIMAL THEMES • ANIMAL • AQUATIC • ARTWORK • AVIAN • BEAK • BIRD • CAMPANIAN • CARNIVORE • COLOR IMAGE • COPY SPACE • CREATURE • CRETACEOUS • CUTOUT • DIGITALLY GENERATED IMAGE • DINOSAUR • DINOSAURS • EVOLUTION • EXTINCT • FLIGHTLESS BIRDS • FULL LENGTH • HESPERORNIS • ILLUSTRATION • LARGE • MESOZOIC ERA • MOUTH OPEN • NO PEOPLE • ONE ANIMAL • OPEN MOUTH • OPEN-MOUTHED • PALAEONTOLOGY • PALAEOZOOLOGY • PALEOBIOLOGY • PALEONTOLOGY • PALEOZOOLOGY • PISCIVORE • POWERFUL • PREHISTORIC ERA • PRIMEVAL • REAR VIEW • SCIENCE: EVOLUTION • SNOUT • SPECIES • SQUARE IMAGE • STANDING • VERTEBRATE • WHITE BACKGROUND • WILDLIFE • WING • WITHOUT PEOPLE • ZOOLOGY