skull and upper skeleton of an alaskan hadrosuar or duck-billed dinosaur much older than other hadrosuars against black background

alaska alaskan ancient animal archeology background bone bones closeup cranial creature cretaceous detail dinosaur duck duckbilled era evolution extinct extinction fossil fossilized fossils hadosuar hadrosauridae head herbivore herbivorous isolated jurassic lizard mouth nature ornithopod paleontology predator prehistoric prehistory primeval reptile research science scientific skeletal skeleton skull teeth white wild wildlife