Double crested dinosaur was a dinosaur that lived in the early Jurassic period, with a body length of about6-7Rice, with a slender physique. They have two irregular shaped crests on their heads that are approximately semi elliptical or battle axe shaped, hence the name Double crested Dragon. Double crested dragons have many small and sharp teeth; The forelimbs are short and the hind limbs are long and sturdy, allowing for agile movement when walking with the hind limbs; The tail is long and powerful, which can maintain body balance when walking.