From Academic Kids
Protoceratops is a sheep-sized, herbivorous ceratopsian dinosaur from the Upper Cretaceous of Mongolia. There are two recognized species: the type species P. andrewsi and the newly named P. hellenikorhinus. Unlike later ceratopsians, it lacked well-developed horns.
Protoceratops had a large neck frill, which may have served to protect the neck, to anchor jaw muscles, or to impress other members of the species. In 1971, A Velociraptor was found clutched around a Protoceratops in Mongolia. It is believed both died at once while fighting, when they were either surprised by a sand storm or buried when a sand dune collapsed on top of them.