Valdosaurus otherwise referred as "weald lizard" belongs to the family Ornithopod dinosaur that had been found to exist in the late Cretaceous Period, 145 and 125 million years ago. This was also the period where flowering plants first appeared. The Valdosaurus was a euornithopod dinosaur. This herbivore species comes under the classification of Chordata, Dinosauria, Ornithischia, Ornithopoda, Dryosauroidea, Dryosauridae.
The remains of the species are found scattered on the regions of Western Europe. From the skeletal pattern it has been observed that this type of dinosaur is a medium sized creature measuring about 4 feet long and weighing approximately 20-25 pounds. The species typically walked on two legs and often characterized by having three-toed feet with horny beaks. The distinguishing feature of this species is that it has thigh bones reaching a length of half a meter, making it a juvenile dinosaur.