Although some oviraptorosaurs such as Caudipteryx and Incisivosaurus are thought to have been mostly herbivorous , Gigantoraptor had long hind legs with proportions that allowed for fast movement ( it was probably more nimble than the larger and less agile Tarbosaurus ) , and large claws , a combination that is not usually found in herbivores of this size .
Although some oviraptorosaurs such as Caudipteryx and Incisivosaurus are thought to have been mostly herbivorous , Gigantoraptor had long hind legs with proportions that allowed for fast movement , and large claws , a combination that is not usually found in herbivores of this size .