English: Yutyrannus is the largest dinosaur discovered with direct evidence of feathers. It is a large basal tyrannosauroid, growing to about 9 m in length, and weighing around 1.5 t. Yutyrannus is known from three nearly complete individuals: an adult, subadult, and a juvenile. Because they were found together, it is theorized that they may have hunted in packs. Adults sported a high midline crest on the snout, as well as one above each eye. Unlike more derived tyrannosaurs, Yutyrannus had long forearms with three fingers on each hand. Feathers in the fossil specimens are present on various parts of the bodies of all three individuals, implying total coverage.