Quick ‘n’ dirty picture showing what I know off of the top of my head of tyrannosaurid integument–green is glabrous, red is scaly. Images are from Phylopic, top is Tyrannosaurus rex (Scott Hartman), middle is Tarbosaurus baatar (Matt Martyniuk), bottom is Albertosaurus libratus (Craig Dylke). More impressions are known for Tyrannosaurus rex and Albertosaurus libratus; Tyrannosaurus rex’s integument might be glabrous rather than scaly.
Could you show me a timeline of bird evolution from the most recent common aviator of all Eumaniraptorans to the most recent common ancestor of Neornithes and label each one? Thanks