Heyuannia is a type of dinosaur that lived during the Late Cretaceous period, about 70 to 66 million years ago. This dinosaur was found mainly in what is now China and Mongolia.

**Naming and Discovery**
Heyuannia is named after the city of Heyuan in China. The first species discovered, named Heyuannia huangi, was described by a scientist named Lü Junchang in 2002. The second species, Heyuannia yanshini, was originally called Ingenia yanshini and was discovered earlier in 1981 by Rinchen Barsbold in Mongolia. Because the name Ingenia was already used for another organism, scientists later changed the name to Ajancingenia, which was also eventually combined with Heyuannia.

**What Did Heyuannia Look Like?**
Heyuannia was a medium-sized dinosaur. It was about 1.5 meters long and weighed around 20 kilograms. This dinosaur had a short, toothless skull and a steep snout. Its arms were very short, with one of its fingers smaller than the others.

**Where Did It Live?**
Heyuannia lived in Asia, specifically in areas that are now parts of China and Mongolia. It is part of the family Oviraptoridae, which includes various other similar dinosaurs.

**Interesting Facts**
There is evidence that the eggs laid by Heyuannia were blue-green in color. This might have helped the eggs blend into their surroundings to protect them from predators. Fossils show that Heyuannia likely cared for its young, indicating that it had a family structure similar to some modern birds.

In summary, Heyuannia was a unique dinosaur that gives us insights into the lives of dinosaurs and their behaviors, especially in nesting and caring for their young.