Yutyrannus, scientifically known as "Yutyrannus huali," belongs to the group of theropod dinosaurs. Its name is derived from the Mandarin words "Yutu" (feathered) and "Tyrannus" (tyrant), aptly describing its large size and feathered appearance. This dinosaur lived during the Early Cretaceous, approximately 125 million years ago.

The fossil remains of Yutyrannus were discovered in the Yixian Formation of Liaoning Province, China, in 2012, making it one of the largest feathered dinosaurs ever found.

Yutyrannus was an awe-inspiring dinosaur, measuring up to 30 feet (9 meters) in length and weighing around 1414 kilograms or 3117 pounds. It is notable for being one of the largest known dinosaurs to have possessed feathers. These feathers were likely not used for flight but served other functions, such as insulation and display. The documented Yutyrannus specimens provide clear evidence of feathers through fossil imprints. These feathers were long, measuring up to 20 centimeters (7.9 inches), and exhibited a filamentous structure. Due to the limited quality of preservation, it was challenging to determine whether the filaments were simple or compound, as well as broad or narrow.

Despite its large size, Yutyrannus was not as robust as its later relative, Tyrannosaurus rex. It had a slender build, long tail, and three-fingered hands armed with sharp claws, typical of theropods.

Yutyrannus is represented by three remarkably preserved fossil specimens, including an adult, a subadult, and a juvenile. These specimens were obtained from a fossil dealer, who asserted that they all originated from the same quarry at Batu Yingzi in Liaoning Province, China.