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Tarbosaurus is one of the best known and one of the biggest tyrannosaurids. Only T rexis bigger and despite t-rex only Zhuchengtyrannus was as big as Tarbosaurus.Tarbosaurus was ca 12 metreslong and is known from several skeleton . It lived inasia in the late cretaceous.
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nope,actually we have skin impressions from albertosaurus that show that the big tyrannosaurids were scaled. This doesnt mean that they had no feathers but that they were scaled mostly. Yutyrannus is a basal trannosauroid , it is closely related to the earlier coelurids, whichare tyrannosauroids too . These jurassic small carnivores had probably feathers and during the evolution of tyrannosaurids,the feathers probably got lost in the big tyrannosaurids.
Well, since albertosaurus lived in canada some of them may have had feathers,as for tarbosaurus it may have had display feathers,or since the desert is quite cold at night some feathers for insulation.