| Diet | Herbivore |
| Height | 0.6m |
| Length | 1.5m |
| Weight | 20 kg |
| Environment | Land |
| Era | Cretaceous |
| Period | Early Cretaceous |
| Type | Ceratopsian |
| Location | China, Mongolia, Russia, Thailan |
Psittacosaurus was a remarkable early ceratopsian dinosaur that lived between 137 and 110 million years ago during the Early Cretaceous period across what is now China, Mongolia, Russia, and Thailand. Unlike its famous four-legged relatives such as Triceratops, Psittacosaurus was an obligate biped that walked upright on its hind legs throughout its adult life, making it quite unique amongst ceratopsian dinosaurs.
This small herbivore measured approximately 1.5 metres in length and stood about 60 centimetres tall at the hip, weighing roughly 20 kilograms. Its most distinctive feature was its high, robust skull topped with a powerful parrot-like beak that gave the dinosaur its name. This sharp beak was perfectly adapted for slicing through tough plant material, whilst rows of small teeth further back in the jaw helped process vegetation.
Psittacosaurus holds the remarkable distinction of being the most species-rich non-avian dinosaur genus, with up to 13 different species identified across Asia. One extraordinary specimen was discovered with long, bristle-like filaments preserved along its tail, suggesting these ceratopsians may have sported primitive feather-like structures for display or temperature regulation.
Brain analysis suggests Psittacosaurus possessed complex behaviours and was likely active during both day and night periods. Its well-developed senses of smell and vision would have helped it navigate its environment, locate food, and avoid predators in the diverse Early Cretaceous ecosystems of Asia.
Psittacosaurus had a distinctive high skull with a robust, parrot-like beak and walked upright on two legs as an adult. Some specimens preserve long, bristle-like filaments along the tail, and it lacked the elaborate frills and horns of later ceratopsians.
Psittacosaurus likely exhibited complex social behaviours and was active during both daylight and nighttime hours. Its well-developed brain suggests sophisticated sensory capabilities, with excellent vision and smell helping it forage for plants and detect threats in its Asian forest environments.
Psittacosaurus occasionally appears in documentaries about Early Cretaceous life and dinosaur evolution, though it is less commonly featured than larger ceratopsians like Triceratops.
Psittacosaurus was first described by Henry Fairfield Osborn in 1922. The original fossils were discovered at Mongolia.
